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Tremendous amounts of water flow steadily over Niagara Falls, which straddles the border of New York and the Canadian province of Ontario. The water moves at speeds ranging from 2 to 3 feet per second. Over time, what will most likely happen to the rock wall behind the falls?
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Explanation:
Given details=
Water flowing at the pace of 2 to 3 feet per sec
It must be understood that flowing water act as an erosive agent here.
As the water flows, it carries with itself erosive tools which erode the rock surface. Since the speed of water is considerable, the erosion is quite significant. Due to the erosive action of the river, the rock wall would be continuously eroded starting from the tip and in turn, would recede backwards (in the upstream direction).
The water will weaken the rock wall. Therefore, the wall will gradually crumble or wear away.
Related Questions
A studen is completing a Punnett square for trait (X/x) that is autosomal and inherited by the dominant allele. The father does not have it but the mother does. If they have two children, a son and a daughter, what would the completed Punnett square look like
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In the observation, there is a 50% chance for each child to inherit the trait, (X/x) that is autosomal and inherited by the dominant allele.
What is autosomal dominant inheritance?Autosomal dominant inheritance is the way of passing genetic traits from parents to children.
The cross between Xx and xx.
Creating offspring with having 50% probability of having this character.
While the father xx lacks the feature, the mother XX does.
The cross is attached in the image below.
There are only two genotypes, Xx and xx, which occur equally frequently.
Therefore, the children have a 50% chance of inheriting the characteristic.
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Cholesterol helps maintain the rigidness of the _____
membrane because it's an amphipathic molecule.
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Answer:
Why a bilayer?
What's on the inside of the cell and on the outside? Mostly water. As you can see here, the water-based interior of the cell has lots of components. These need to be kept inside the cell. And it is the nature of the phospholipid bilayer to keep the inside of the cell separate from the outside.
Explanation:
Cholesterol helps in maintaining the rigidness of the cell membrane.
• The plasma membrane of the cell is a fluid combination of cholesterol, phospholipids, and proteins. The cholesterol helps in maintaining the membrane of the cell firm and stability over a different range of temperatures.
• Cholesterol is an amphipathic molecule, which comprises a tetracyclic ring composition and holds a trans conformation. This helps the molecule to exhibit a rigid and planar feature that enhances the packing of the membrane, and also contributes to the rigidity and integrity of the cell membranes.
Thus, the given blank can be filled with cell.
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Which of the following is NOT a function of the nervous system?
a. receives information about your body
c. signals a response to stimuli
b. maintains homeostasis
d all of these are nervous system functions
Answers
Answer:
d
Explanation:
all of these are nervous system function
Answer:
D
Explanation:
All of these are nervous system functions, your nervous system controls your whole body. Since your nervous system is comprised of your brain and other things like the brain stem, everything in your body you can imagine is from the nervous system.
An ecologist was observing two species of mouse that lived at different elevations on a mountain. In the lab, she observed that the two species ate the same diet and so she hypothesized that they had the same fundamental niche, but that the high elevation species was occupying a realized niche. How could she test the hypothesis
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The species had the same fundamental niche, but the high-altitude species was occupying a perceived niche, as it was inhabiting a different ecosystem, with different adaptations, but being the same species.
Why is the perceived niche considered a subset of the fundamental niche?Well, as we know, the perceived niche is smaller than the fundamental niche, in other words it is a specific portion of the fundamental niche, so it is considered a subset of the fundamental niche.
With this information, we can conclude that the species had the same fundamental niche, but that the high-altitude species was occupying a perceived niche, as it was inhabiting a different ecosystem, with different adaptations, but being the same species.
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Which of the following mechanisms of change in genefrequencies is responsible for the antibiotic resistance of E. coli in this experiment?
A. founder effect
B. natural selection
C. population bottleneck
D. genetic drift
Answers
Natural selection is the mechanism responsible for the antibiotic resistance of E. coli.
Natural selection is a mechanism that favors the adaptation of organisms to survive in their environment, thrive and reproduce.
In the context of antibiotic resistance, antimicrobial substances exert selective pressure on microbes that encourages the evolution of resistance.
Those capable of resisting the effects of antibiotics survive and reproduce, while the vulnerable either die or have their growth inhibited.
The excessive and inappropriate use of antibiotics favors selection for antibiotic resistance in bacteria.
E. coli is characterized by having Gram negative bacilli, it represents the greatest risks of zoonotic transfer of resistance.
In general, and when a treatment is short, there is an elimination of sensitive saprophytic strains of E. Coli and an enormous predominance of resistant strains.
Bacteria also acquire antimicrobial resistance through vertical or horizontal transfer of genetic information.
Therefore, we can conclude that resistance to antibiotics in E. coli is due to the process of natural selection since it evolves to resist the action of an antimicrobial agent.
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How is matter transformed within the process of photosynthesis
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Answer:
Matter is transfered through the light stage due to the trapping if water
Explanation:
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Why is plant transpiration important to humans? (EXPLAIN)
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Answer:
In humans, the force driving circulation is the heartbeat; in plants, it's transpiration. Secondly, transpiration cools the plant. Many animals use water to regulate internal body temperature. When we get too hot, we perspire, and as the water on the surface of our skin evaporates, it cools us.
Explanation:
ANALYZE Why might scientists choose to study the genomes of healthy elderly people
when searching for mutations that lead to a more beneficial phenotype?
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Several genetic mechanisms for defense against age-related disease may be studied in the genomes, according to scientists.
Does behavior depend on phenotype?The numerous ways in which an individual interacts with some of its environments, whether in its responses to predators, food sources, and habitat, or in its relational or monogamous relationships with conspecifics, appear to be influenced by its behavioral phenotype.
Can the phenotype of two persons be identical?Yes, it is conceivable for two people to have distinct genotypes and the same phenotype. Each parent contributes one allele to an individual, which may be considered dominant or recessive depending on the trait.
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What is an energy pyramid????
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Answer:
From each trophic stage in an ecosystem, a pyramid of energy reflects how much energy, originally from the sun, is retained or deposited in the form of new biomass. Around 10% of the energy is typically passed from one trophic level to the next, preventing a large number of trophic levels from forming.
Explanation:
example:
Pleaseeee help!!! (psychology edge) Androgens and estrogens are hormones that impact the sexual response cycle. Write about the four phases of that cycle and explain how the two types of hormones are involved.
Answers
Answer:
Females and males each have some amount of the sex hormones, androgens and estrogens. In males however, androgens like testosterone is more dominant and in females estrogens like estradiol are more dominant. The hormones both affect the sexual response cycle. The sexual response cycle has four phases: desire, arousal, orgasm and resolution. The desire phase can last anywhere from a few minutes to hours and includes physical changes like an increase in muscle tension, heartbeats quickening, flushed skin, and an increased flow of blood to genitals. The arousal phase extends to the brink of the orgasm phase, during this phase the changes experienced in the desire phase are intensified along with blood pressure increasing. The orgasm phase generally only lasts a few seconds and is the climax of the sexual response cycle, some characteristics include: Involuntary muscle contractions and spasms, blood pressure, breathing, and heart rate at their highest point, a release of built up sexual tension, and flushed skin. During the resolution phase the body returns to normal, often a sense of wellbeing and fatigue is achieved. To begin the cycle a male need a certain amount of the androgen, testosterone, but high levels in females tend to lead to more sexual thought and desires, typically though, women have relatively low levels of testosterone. In women, estrogens, such as estradiol are more common. Estrogens are produced when a girl starts puberty and helps her reproductive cycle begin. A high level of estrogen in men can lead to a reduced sex drive, loss of hair, or trouble focusing, but a normal level in men is crucial to proper erectile function.
Explanation:
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the effects of toxic chemicals are minimized by which following three mechanisms
Answers
Answer:
Metabolic degradation, excretion, and repair.
Explanation:
use the principle of parsimony to infer the history of saber tooth evolution based upon this carnivore phylogeny (yellow indicates presence of saber teeth).multiple choice question.saber teeth evolved only once; it is an ancestral trait for all extant members of the carnivore clade.
Answers
The history of saber-tooth evolution is important while studying carnivore phylogeny. The correct inference from this phylogeny is that the saber-tooth evolved twice in felines and nimravids.
Saber-toothed are animals with long sharp canine teeth. These are named because of the long, curved, strong, knife-like teeth in those animals. These animals are extinct species that are cat-like carnivores. These animals evolved twice and are branched into two branches in the phylogenetic tree of carnivores.
Once they evolved as animals belonging to the family Nimravidae and go existed 37-7 million years ago. And another evolved as an animal belonging to the subfamily Felidae and exist about 12 million - 10,000 years ago. Most of the animals that belong to the true cat family are referred to as saber-toothed lions and saber-toothed tigers. The correct inference is option D.
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The complete question is -
Use the principle of parsimony to infer the history of saber tooth evolution based upon this carnivore phylogeny (yellow indicates the presence of saber teeth).
A. Saber teeth evolved only once; it is an ancestral trait for all extant members of the carnivore clade.
B. Saber teeth evolved only once; it is a derived trait for all extant members of the carnivore clade.
C. Saber teeth evolved only once but were lost in hyenas, civets, mongooses, and the clade that includes bears and seals.
D. Saber teeth evolved twice, once in felines and once in nimravids.
Water moves via osmosis
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Answer:
Water moves via osmosis from an area with high concentration to an area with low concentration.
Explanation:
State one substance that leaves the blood as it flows through the tissues of the small intestine.
Answers
Answer:
Superior mesenteric artery.
The primary source of energy for the body is a form of sugar called glucose. It travels to cells all throughout the body after being absorbed into circulation from the small intestine.
Other chemicals that enter the circulation through the small intestine include the following:
Proteins' building components are amino acids.
The lipids' building components are fatty acids.
minerals and vitamins
Water
In an adult, the small intestine is a muscular tube that is roughly 20 feet long. It is situated in the belly, above the large intestine, and below the stomach. The bulk of digestion and nutritional absorption from meals occurs in the small intestine.
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Arrange the following steps from a typical genetic modification procedure into their correct sequence.
a. Select the gene of interest + insert into plasmid
b. Protein product harvested from bacteria
c. Isolate bacterial plasmid
d. Bacteria replicate
e. Cloned gene harvested from bacteria
f. Plasmid taken up by bacterium
Answers
Answer:
c. Isolate bacterial plasmid
a. Select the gene of interest + insert into plasmid
f. Plasmid taken up by bacterium
d. Bacteria replicate
e. Cloned gene harvested from bacteria
b. Protein product harvested from bacteria
Explanation:
Genetic modification refers to the biological procedure involving the manipulation of an organism's genome in order to achieve a desirable result. This process is carried out by inserting or deleting a desirable gene (encodes the desirable trait) from the organism.
Bacteria DNA called PLASMID is commonly used for genetic engineering/modification procedure. The plasmid is used to convey/carry the gene into the organism. According to this question, the correct order of the procedure is as follows:
- c. Isolate bacterial plasmid
- a. Select the gene of interest + insert into plasmid
- f. Plasmid taken up by bacterium
- d. Bacteria replicate
- e. Cloned gene harvested from bacteria
- b. Protein product harvested from bacteria
the organisms that feed on dead and decaying matter are called
A. Saprotrophs
B. Autotrophs
C. Heterotrophs
D. Parasite
Answers
The organisms that feed on dead and decaying matter are called Saprotrophs.
An organism that feeds on dead and decaying organic matter is called a saprotroph. These organisms are heterotrophic, which means that they obtain their food from other sources. They are important in the ecosystem because they break down dead organic matter and recycle it back into the soil, making nutrients available to other living organisms
Answer:
A. Saprotrophs
Explanation:
Saprotrophs are organisms that obtain their nutrients by feeding on dead and decaying matter. They play a crucial role in the ecosystem by decomposing organic material and recycling nutrients back into the environment.
These organisms secrete enzymes that break down complex organic compounds into simpler substances, such as sugars and amino acids, which they can absorb and utilize for their own growth and energy needs. Examples of saprotrophs include fungi (such as mushrooms and molds) and certain bacteria.
Unlike autotrophs, which can produce their own food through photosynthesis or chemosynthesis, saprotrophs rely on external sources of organic matter for their nutrition. They actively decompose dead plants, animals, and other organic materials, aiding in the process of nutrient recycling and decomposition.
Heterotrophs, on the other hand, are a broader category of organisms that obtain their nutrients by consuming other living or dead organisms. This includes saprotrophs, as well as other types of organisms such as herbivores, carnivores, and omnivores.
Parasites, meanwhile, are organisms that live in or on other organisms, known as hosts, and obtain their nutrients from the host while causing harm or damage to it. Unlike saprotrophs, parasites typically rely on a living host for their sustenance rather than feeding on dead and decaying matter.
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how does a doctor help us to make our life healthy? explain with examples
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Answer:
Doctors save lives, but their importance goes far beyond that. Doctors also make a difference by helping patients minimize pain, recover from a disease faster or learn to live with a disabling injury. A patient's ability to enjoy life, even if they can't be cured, makes a huge difference to them and to their families.
Answer: Doctors save lives, but their significance extends far further. Doctors also make a difference by assisting patients in reducing pain, speeding up the recovery process from sickness, or learning to live with a debilitating disability. Even if a patient cannot be healed, their capacity to enjoy life makes a significant difference to them and their relatives.
Residual parent material refers to the *weathered rock* and *soil* that remains in its place of origin, while *transported parent material* is material that has been carried and deposited by natural agents such as water, wind, or glaciers.
The impact of these different types of parent material on *soil formation* can be significant. Residual parent material tends to contribute to the formation of soils with characteristics similar to the parent rock. The weathering process breaks down the rock into smaller particles, allowing for the development of soil horizons and the release of minerals that influence soil fertility. In contrast, transported parent material can introduce a diverse range of materials to a given area, leading to variations in soil composition, texture, and fertility. The transportation process can mix different types of sediment, resulting in the formation of heterogeneous soils with varying properties.
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Residual parent material is the rock and soil that is still located in its original location and is weathered. Transported parent material is material that is carried and deposited by natural agents such as water, wind, or glaciers. The effect of these different types of parent material on soil formation can be significant.
Residual parent material usually contributes to the development of soils with qualities similar to the parent rock. The breakdown of rock into smaller particles through weathering enables the formation of soil horizons and the release of minerals that influence soil fertility.
The physical and chemical characteristics of soils derived from this form of parent material are often similar and homogeneous, allowing for predictable fertility and properties. Transported parent material, on the other hand, can introduce a diverse range of materials to a given area, resulting in variations in soil composition, texture, and fertility.
The transportation process can blend different types of sediment, resulting in the formation of heterogeneous soils with different characteristics. Transported parent material can also be exposed to weathering processes, altering its original composition and resulting in soils with varying degrees of fertility.
While transported parent material can increase the diversity of soil properties in an area, it can also make it difficult to predict soil characteristics, particularly in areas where different types of sediment have been deposited. The relationship between parent material and soil development is complex, with both the initial characteristics of the material and the surrounding environment influencing soil properties.
In general, residual parent material contributes to the development of homogeneous soils with predictable properties, while transported parent material can result in more diverse and heterogeneous soils.
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The composition of ocean water can change.
True
False
Answers
Ocean Composition can change only if wastes, or substances are introduced into it.
Ocean Composition change?Ocean Composition cannot change because it already contain the fixed amount of constituents in it.
It can change also if some particles or substances are introduced into it.
Ocean refer to water that have more concentration of salt. It is also called seawater and it contain mixture of 96.5 percent water, 2.5 percent salts, and smaller amounts of some substances such as particles, gases, dissolved organic and inorganic substances.
Therefore, Ocean Composition cannot change because it already contain the fixed amount of constituents in it.
It can change also if some particles or substances are introduced into it.
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what is photosynthesis ??
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Answer:
photosynthesis is the process of making food in the presence of sunlight and water
Answer:
The process in which green plants prepare their food by using minerals and carbon dioxide in the presence of sunlight is called photosynthesis .
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Which term does IUCN use to say that a species appears to have a large enough population and enough resources for the future?
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When a species' population is limited to the less than 50 adult individuals, it is deemed severely endangered.
What are the IUCN's three classifications?Depending on how seriously they are threatened, threatened species are divided into three categories by the International Union for the Conservation of Nature: vulnerable, endangered, and severely endangered.
What three purposes does the IUCN Red List assign to this list?Multilateral Environmental Agreement decisions are based in part on information from the IUCN Red List. It is frequently used as a guide to update the annexes of certain significant international accords, including the Convention of Migratory Species and the Convention of Threatened Species (CITES) (CMS).
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Burning of fossil fuels has Change the atmosphere by
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Answer:
increasing the concentration of atmospheric carbon dioxide (CO2).
Explanation:
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List the structures that are found in all types of cells?
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2 - Cytoplasm
3 - DNA
4 - Ribosomes
What is a predator? Give two examples.
PLEASE
Answers
Answer:
Some very common examples are a lion (predator) and a zebra (pray) or a bear (predator) and a salmon (pray).
Explanation:
A predator is an organism (plant or animal) that eats another organism (plant or animal). The prey is the organism that is eaten by the predator. Which means the predator is the thing eating the pray.
Answer:
A Predator can not be eaten but eats the others and a predator is probaly not afraid to get in a fight with another animal
Explanation:
Which of the following is not true?
A. Humans rely entirely on technological adaptations in order to thrive in various environments and they do not exhibit biological adaptations.
B. All humans living today belong to a single species.
C. Humanity cannot be classified into discrete, bounded geographic categories because variation in most traits exists along clines.
D. Ecological and social environments lead to biological differences between individuals.
E. Biological differences across human populations are in part due to biological adaptations to local environments.
Answers
Answer A
Does the pharynx of human respiratory system have cartilage and epithelium?
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Answer:
There is no cartilage but there is epithelium
Explanation:
The pharynx of the human respiratory system does not contain cartilage.
The pharynx, part of the human respiratory system, is a muscular tube that connects the nasal cavity and mouth to the larynx and esophagus. It serves as a passage for air and food. The gorge is made up of several regions, each with its own distinctive features.
The nasopharynx, the top part of the throat, contains no cartilage. Instead, it is lined with pseudostratified ciliated epithelium.This special epithelium helps to trap and transport mucus along with any particles or pathogens in the digestive system for elimination.
These regions also lack cartilage but are lined with stratified squamous epithelium. This type of epithelium provides protection from mechanical stress and potential abrasion caused by the passage of food and other substances down the pharynx.
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Which of the following is true of all horizontally oriented phylogenetic trees, where time advances as you move towards the right? a.Each branch point represents a point in absolute time.b. Organisms represented near the bottom of the tree are the most common/most abundant descendants of those represented at the top of the tree c.The fewer branch points that occur between two taxa he more divergent their DNA sequences should be. d,The common ancestor represented by the rightmost branch point existed more recently in time than the common ancestors represented at branch points located to the left e.The more branch points there are the fewer taxa are likely to be represented
Answers
D: The common ancestor represented by the rightmost branch point existed more recently in time than the common ancestors represented at branch points located to the left, is true of all horizontally oriented phylogenetic trees, where time advances as you move towards the right
In a horizontally oriented phylogenetic tree, time advances as you move toward the right. Therefore, the common ancestor represented by the rightmost branch point is the most recent common ancestor, while the common ancestors represented at branch points located to the left are older and existed earlier in time.
Option A is incorrect because branch points do not represent absolute time, but rather relative time.
Option B is incorrect because the position of organisms on the tree does not indicate their abundance or commonness.
Option C is incorrect because the fewer branch points between two taxa, the more closely related they are and the less divergent their DNA sequences should be.
Option E is incorrect because the number of branch points does not necessarily correlate with the number of taxa represented.
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he following diagram shows the branching tree diagram for some animals.
A slanting line is shown. There are five lines drawn vertically on this line at equal intervals. Shark, Frog, Kangaroo, Lion and Chimpanzee are written on top of each vertical line in order from left to right. Common Ancestor is written on the left end of the line. There is a black circle between each pair of these vertical lines. The first black circle is before Shark and says Vertebrae. The second black circle is between Shark and Frog and says Lungs. The third black circle is between Frog and Kangaroo and says Mammary gland. The fourth black circle is between Kangaroo and Lion and says Placenta. The fifth black circle is between Lion and Chimpanzee and says Large brain.
Which two organisms share the greatest number of derived characteristics?
Frog and kangaroo
Kangaroo and chimpanzee
Lion and chimpanzee
Shark and chimpanzee
Answers
The two organisms that share the least number of derived characteristics are Kangaroo and chimpanzee.
What is an organism?
Taxonomy divides living things into categories like multicellular animals, plants, and fungus, or unicellular microbes like protists, bacteria, and archaea.All kinds of creatures are capable of responding to stimuli in some capacity and reproducing, growing, and developing. Multicellular organisms that distinguish specialised tissues and organs throughout development include squids, tetrapods, vascular plants, beetles, and mushrooms.Prokaryotes and eukaryotes are both types of unicellular organisms. The two distinct domains of bacteria and archaea are prokaryotes.To know more about organisms, click the link given below:
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Describe the path of an oocyte from ovary to fertilization please!
Answers
An oocyte is also known as egg cell which is a female gamete, it is produced by the ovaries and travels through the female reproductive tract and fuse with the sperm to form zygote.
What is fertilization?Fertilization can be defined as the fusion of a haploid male gamete i.e., spermatozoa or sperm and a haploid female gamete i.e., ovum to form a diploid cell (2n), the zygote inside the body of the female in case of mammals. The fertilization is internal in the case of humans and usually after nine months the fully matured baby is born.
The path of the haploid (n) oocyte or egg cell from the ovary to fertilization include first, the oocyte leaves the ovary as an unfertilized egg during the period of ovulation. From here, the oocyte enters uterine tube (fallopian tube) and begins to move down towards the uterus, through the help of cilia which are present along the walls of the fallopian tube. If fertilization is taking place, it usually happens within the next 24 hours or else the oocyte degenerate.
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Which equations will find the distance between the lions and giraffes? Select all that apply. 11+16 = c 112+ 162 = c2 c2+ 162 = 112 121+ 256 = c2 11(2)+16(2) = 2c
Answers
Answer:
11+16 = c and 11(2)+16(2) = 2c are the equations that will find the distance between the lions and giraffes. The first equation will find the distance between the lions and the giraffes when they are positioned one unit apart. The second equation will find the distance between the lions and the giraffes when they are positioned two units apart.
Explanation:
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