Answer:
A food web is made of web chains
My food web is made of food chain, each of which Starts with a producer and includes consumers with their respective trophic levels. Many food chains are intertwined to form a food web that share niches.
A particular ecosystem of a place usually have three different types of food chains. They are; grazing food chain made of producers and primary consumers, consumers food chain made of carnivores, and the detritus food chain made of microbes.
Hence, based on the above-mentioned statements, it can be pointed out that a food web is made of a food chain(s) each of which contains a set of producers and consumers.
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16. Which of the following actions lead to long-
shore drift?
A.wave action wearing away layers of soft
rock
B. the collapse of the base of a sea stack
C. the formation of a barrier island
D. sediments are carried by a current along
the beach
Answer:
A
Explanation:
How can water from a small stream on a mountain north carolina affect an estuary that is hundreds of miles away ?
Water from a small stream on a mountain in North Carolina can affect an estuary that is hundreds of miles away so that pollution can accumulate and damage the estuary from the small stream.
What is an estuary and why is it important?The importance of estuaries is very relevant. Estuaries provide food and habitat to a very wide range of living beings with a decisive role in the marine food chain, where we can highlight several species of fish with commercial value.
With this information, we can conclude that water from a small stream on a mountain in North Carolina can affect an estuary that is hundreds of miles away so that pollution can accumulate and damage the estuary from the small stream.
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2. Sam and Jerry are having a discussion in their Environmental Science class. Sam
says that abiotic factors determine what biotic factors can be in an ecosystem. Jerry
says that biotic factors determine what abiotic factors can be in an ecosystem. Who
is correct? Use an example to support your answer. (2 points)
says that abiotic factors determine what biotic factors can be in an ecosystem. Jerry
which of the following describes a phylogenetic constraint? select one: a. factors that prevent adaptive radiations in a particular phylogenetic lineage b. a convergently evolved character that is making cladistic analyses difficult c. a developmental pathway in a group of organisms that can be modified by natural selection but that is difficult to reverse d. some groups of organisms speciate less frequently than others e. high rates of extinction in a group of organisms
The correct option is : c) "a developmental pathway" in a group of organisms that can be modified by natural selection but that is difficult to reverse.
A phylogenetic constraint is a factor that limits or restricts the evolutionary options of a particular group of organisms due to their shared ancestry or evolutionary history. It can manifest in various ways, such as the inability to evolve certain traits or adaptations or the tendency to follow a particular developmental pathway. Option c is the correct answer as it describes a developmental pathway that is difficult to reverse even though it can be modified by natural selection. This means that the organisms in the group are limited in their ability to evolve new or different traits that may be advantageous in their environment.
For example, the development of wings in birds is a complex process that involves a specific set of genetic and molecular pathways. While natural selection can modify these pathways to improve flight performance, it is difficult to completely reverse the developmental pathway and evolve wings with a completely different structure. This is an example of a phylogenetic constraint that limits the evolutionary options of birds in terms of flight adaptations.
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What is the maximum volume of blood that can be collected form a 110-lb donor, including samples for processing? A 450mL. B 500mL. C 525mL. D 550mL
The maximum volume of blood that can be collected from a 110-lb donor, including samples for processing, is typically limited to around
c. 525mL, or slightly less than 2 pints called maximum blood volume
This is known as the "maximum blood volume" or "maximum blood draw" limit, and it is established to minimize the risk of adverse effects, such as lightheadedness, fainting, or low blood pressure. The maximum blood volume is calculated based on various factors, including the donor's weight, height, and overall health. The amount of blood that can be collected also depends on the specific procedures being performed, as well as the presence of any underlying medical conditions that may affect the donor's ability to tolerate the blood draw. Overall, it is important to follow established guidelines and protocols when collecting blood from donors to ensure the safety and well-being of the donor.
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the pleasure center of the brain is located in the
The pleasure center of the brain is located in the nucleus accumbens.
The nucleus accumbens is a region located deep within the brain, specifically in the basal ganglia, which is involved in reward and pleasure processing. It is part of the brain's reward pathway and plays a crucial role in mediating the experience of pleasure, motivation, and reinforcement. The nucleus accumbens receives input from various brain regions, including the prefrontal cortex and the hippocampus, and integrates this information to regulate feelings of pleasure and reward.
When an individual engages in pleasurable activities such as eating delicious food or engaging in enjoyable activities, the nucleus accumbens is activated, releasing dopamine, a neurotransmitter associated with reward and pleasure. This activation of the pleasure center reinforces the behavior and motivates the individual to seek out similar pleasurable experiences in the future.
In summary, the nucleus accumbens serves as the pleasure center of the brain, playing a vital role in the experience of pleasure and reward.
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3 advantages and disadvantages of the natural ecosystem
Answer:
Urbanization has environmental and economic advantages for humans, but also substantial disadvantages, including increased problems with physical and mental health/stress, a modified climate, water and energy management, and air pollution.
a scientist claims that an individual could carry the allele for huntington's disease, yet show none of its symptoms. which feature of huntington's disease supports this claim?
Feature of Huntington's disease that supports the claim is presence of One gamete that is formed abnormally as the pair of homologous chromosomes are not separated properly .
Huntington's disease occurred due to a single dominant allele. This is a lethal disease, but this is found commonly in the human population. Huntington's disease represents its symptoms during the course in midlife, when people with this disease already had their offspring.
Huntington's disease is generated by a mutation in the gene for a protein called huntingtin. This mutation also causes defect in the building blocks of DNA called cytosine, adenine, and guanine (CAG) and they are repeated many number of times than they normally occurs.
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Which of the following correctly describes a difference between spermatogenesis and oogenesis? a) Spermatogenesis results in four mature sperm cells, while oogenesis results in one mature egg cell b) Spermatogenesis results in one mature sperm cell, while oogenesis results in four mature egg cells c) In spermatogenesis, mitosis occurs twice and meiosis once, while in oogenesis, mitosis occurs once and meiosis twice. permatogenesis results in four mature sperm cells, while oogenesis results in one mature egg eN. In spermatogenesis, mitosis occurs twice and meiosis once, while in oogenesis, mitosis ccurs once and meiosis twice.
The correct answer is option (a): Spermatogenesis results in four mature sperm cells, while oogenesis results in one mature egg cell.
Spermatogenesis is the process of producing sperm cells in the male reproductive system, while oogenesis is the process of producing egg cells (ova) in the female reproductive system. There are key differences in the outcome and the underlying mechanisms of these two processes. During spermatogenesis, a single diploid germ cell undergoes mitosis to produce two identical diploid cells. Each of these cells then undergoes meiosis, resulting in four haploid cells known as spermatids. These spermatids later differentiate into mature sperm cells, which are small, motile, and carry genetic material for fertilization. In contrast, oogenesis begins with a diploid germ cell called an oogonium, which undergoes mitosis to produce two diploid cells.
However, only one of these cells, known as the primary oocyte, continues development. The primary oocyte then undergoes meiosis I, resulting in the formation of a secondary oocyte and a polar body. The secondary oocyte Is a haploid cell and has the potential to be fertilized. If fertilization occurs, it undergoes meiosis II, producing a mature egg cell (ovum) and another polar body. Therefore, the main difference between spermatogenesis and oogenesis is the number of mature gametes produced. Spermatogenesis generates four mature sperm cells, while oogenesis produces one mature egg cell (ovum).
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An example of a receptor in a negative feedback loop controlling body temperature would be.
An example of a receptor in a negative feedback loop that controls an organism's body temperature would be: temperature sensors on the skin that detect a stimulus.
What is a feedback loop?A feedback loop is a biological process in which the output of a system inhibits or amplifies the body system, depending on the surrounding conditions.
Generally, a feedback loop helps to regulate or maintain the body temperature or the amount of hormones secreted in the body of a living organism.
The types of feedback loop.Basically, there are two (2) main types of feedback loop and these include:
Positive feedback loop.Negative feedback loop.A negative feedback loop inhibits or decreases the response by the body system and an example of a receptor in a negative feedback loop that controls an organism's body temperature is temperature sensors located on the skin, so as to detect a stimulus.
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Which of the following answer choices BEST supports the idea that most attempts by scientists to create new elements will fail?
The answer choice which best supports the idea that most attempts by scientists to create new chemical elements will fail is that: (D) scientists have to repeat their experiments an enormous number of times; if it works once it's seen as a success.
What is a chemical element?A chemical element can be defined as a pure substance that comprises atoms having the same atomic number (number of protons) in its nuclei and as such, it is the primary constituent of matter. Also, a common characteristics for all chemical elements found on the periodic table is mass and volume.
In Chemistry, some examples of a chemical element include the following:
Carbon (C)Oxygen (O)Argon (Ar)Sodium (Na)Potassium (K)Mercury (Hg) Hydrogen (H)Zinc (Zn)In this scenario, we can reasonably infer and logically deduce that a statement which indicates that an attempt by scientists to create new chemical elements will fail is stating that "scientists have to repeat their experiments an enormous number of times; if it works once it's seen as a success." because an experiment to create new chemical elements must be tested and they all should have multiple successful results.
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Complete Question:
Which of the following answer choices BEST supports the idea that most attempts by scientists to create new elements will fail?
(A) Scientists have to create a target with a carefully chosen atom; this is a process that takes months.
(B) Scientists have to smash atoms together and get them to stick; a positive charge makes them repel each other.
(C) Scientists have to bombard particles with specific protons; specialized atoms combine with neutrons.
(D) Scientists have to repeat their experiments an enormous number of times; if it works once it's seen as a success
chronic myelogenous leukemia often results from a reciprocal translocation between chromosomes 9 and 22. how does this event lead to cancer?
Convincing science evidence and data suggests that evolution:
occurred in the past, and is still occurring today
is now occurring, but did not occur in the past
occurred in the past but is no longer occurring
Answer:
Occured in the past, and is still occuring today.
Explanation:
Evolution is always happening but at a very slow pace.
A hacker has taken over the computer of a user
A.
Piracy
B.
Malware
C.
Broken Firewall
Answer:
b
Explanation:
Why can't living things be smaller than a cell and still be considered alive?
Answer:
Cells make up the smallest level of a living organism such as yourself and other living things. The cellular level of an organism is where the metabolic processes occur that keep the organism alive. That is why the cell is called the fundamental unit of life.
Explanation:
Several general characteristics of metabolic reactions or reaction pathways are listed below. Sort them into the appropriate metabolic category Anabolism or Catabolism.a. convert small compounds to larger compoundsb. Geberally exergonic (spontaneous)c. Convert NADPH to NADP+d. convert large compounds to smaller compoundse. utilize ATPf. convert NAD+ to NADH
Overview of cellular energy flow, metabolic processes, and anabolism and These chemical processes frequently occur in chains or routes.
Which four primary metabolic processes exist?Blue nodes: fat metabolism, the catabolic route (catabolism) hormonal route (anabolism) a morphological route.
Metabolic pathways: What are they?The most crucial metabolic pathways in people are: Glycolysis is the oxidation of glucose to produce ATP. To produce GTP and useful intermediates, the Krebs' cycle (citric acid cycle) uses acetyl-CoA oxidation. Glycolysis and the citric acid cycle yield electrons, which are then used up in oxidative phosphorylation. In multi-step processes when metabolites are oxidized, metabolic reactions provide energy.
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In bacteria, when transcription begins the promoter is recognized by the _____ a subunit of RNA polymerase. Promoter sequences tend to be rich in _____ and ____ base pairs, which facilitates opening of the DNA duplex.
The promoter is recognized by the sigma (σ) subunit of RNA polymerase. Promoter sequences are rich in G and C base pairs, which facilitates the opening of the DNA complex.
RNA polymerase is the core enzyme for transcription in Bacteria. However, it is a holoenzyme until the sigma subunit binds to it forming the core enzyme. Holoenzymes are enzymes that are not bound by a cofactor, in this case, the sigma subunit. The RNA polymerase cannot recognize the promoter without the sigma subunit.
The promoter is G-C rich as it allows many transcription factors to bind to it causing the DNA complex to open up for the RNA polymerase to travel along the DNA strand to catalyze the synthesis of the RNA strand.
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I'll give you a brainliest if is right or at least shows some effort
(thanks & i hope your having a good day)
In your own words, explain how stalagmites are formed in caves.
Explanation:
As the redeposited minerals build up after countless water drops, a stalactite is formed. If the water that drops to the floor of the cave still has some dissolved calcite in it, it can deposit more dissolved calcite there, forming a stalagmite. Speleothems form at varying rates as calcite crystals build up.what is the main reproduction in mosses . sexual or asexual?
Answer:
Answer is asexual.
Explanation:
because moss reproduces asexually(also called vegetative reproduction ) when parts of the plant break off and form new plants with identical genetic information.
I hope it's helpful!
Why does DNA have so many names?
The location of the sugar and how they were discovered are typically to blame for the various naming standards.
what is DNA?A polymer made of two polynucleotide chains that coil around one another to form a double helix is called deoxyribonucleic acid. All known organisms and many viruses have genetic information in the polymer that is necessary for their development, operation, growth, and reproduction. Nucleic acids include DNA and ribonucleic acid.
what is the function of DNA?DNA has the job of storing all the genetic data needed for an organism to grow, operate, and reproduce. In essence, it is the biological manual that is present in each of your cells. The four letters A, T, C, and G make up the basic alphabet used to encode the instructions in DNA.
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PLEASE HELP!! 20 POINTS
Why are meiosis and fertilizations said to be "complimentary processes"?
Explanation:
to be able to have sexual reproduction
Answer:
OK
Explanation:
if a cell of an organism has 46 chromosomes before meiosis, how many chromosomes will exist in each nucleus after meiosis?
After meiosis, each nucleus will have 23 chromosomes.
Meiosis is a type of cell division that results in the formation of four haploid cells, each containing half the number of chromosomes as the original cell. During meiosis, the cell undergoes two rounds of division, resulting in four daughter cells, each with half the number of chromosomes as the parent cell.
In this case, the parent cell had 46 chromosomes, which means that after meiosis, each daughter cell will have 23 chromosomes. These daughter cells will then mature into gametes (sperm or egg cells), each containing only 23 chromosomes.
When two gametes unite during fertilization, they form a zygote with the full complement of 46 chromosomes, starting the cycle anew.
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(iv) Plants, like all living organisms, need to excrete waste products. Explain how the excretory product of photosynthesis is removed from leaf.
Plants eliminate waste products generated during photosynthesis through a process called transpiration. The primary waste product of photosynthesis is oxygen, and it is removed from the leaf through small openings called stomata.
During photosynthesis, plants absorb carbon dioxide and release oxygen as a byproduct. Oxygen molecules diffuse out of the leaf cells and accumulate in the intercellular spaces within the leaf.
From there, oxygen moves into the stomata, which are tiny pores on the surface of leaves. Stomata are open and close to regulate gas exchange and water loss. When the stomata are open, oxygen is released into the surrounding atmosphere through diffusion, effectively removing it as a waste product.
Transpiration, the process by which water vapor evaporates from the leaf's surface, also helps in the removal of waste products. As water evaporates from the leaf through the stomata, it carries away any dissolved gases, including oxygen.
This process ensures that waste products of photosynthesis are efficiently eliminated from the leaf and allows for the exchange of gases necessary for plant respiration.
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A tropic releasing hormone released from the hypothalamus would be expected to exert which of the following?
(A) It will decrease the release of hormone from the posterior pituitary.
(B) It will decrease the release of hormone from the anterior pituitary.
(C) It will increase the release of hormone from the posterior pituitary.
(D) It could either increase or decrease hormone release from the pituitar
(E) It will increase the release of hormone from the anterior pituitary
A tropic-releasing hormone released from the hypothalamus would be expected to increase the release of TSH hormones from the anterior pituitary. Hence option E is correct.
The thyroid-stimulating hormone(TSH) regulates the activity of the thyroid gland. This hormone is released from the anterior pituitary when there is a release of Thyrotropin-releasing hormone from the Hypothalamus.
The release of TSH stimulates the production of thyroid hormones, thyroxine, and triiodothyronine. These hormones are released when TSH from the pituitary binds to the receptors of the thyroid gland. The thyroid hormones are essential to maintain the heart and digestive functions, brain development, muscle control, and the body’s metabolic activity.
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The chemical requirements for microbial growth include carbon, nitrogen, phosphorus, and sulfur. Why do all cells need nitrogen?.
40. Amino acids are the building blocks of which macromolecule?A. carbohydratesB. proteinsC. lipids
The correct answer is the letter B. proteins
*Amino acids (building blocks of protein) are small organic molecules that primarily consist of carbon atoms that are linked to an amino group, a carboxyl group, a hydrogen atom, and it has a side chain.
*Monosaccharides are the building blocks of carbohydrates.
*Fatty acids and glycerol are the basic building blocks of lipids.
Overview
-
-
Sustainability: a
and the needs of other
Ecological (Carbon) Footprint the amount of
Resources
Renewable resources that are
or replenished
between Earth's resources,
are
than they
emitted and its
Nonrenewable: resources that are
quickly than they are
more
The Overview:
Sustainability is described as to the ability to meet the needs of the present without compromising the ability of future generations to meet their own needs.
Ecological Footprint:
The ecological footprint is described as a measure of the impact that human activities have on the environment and s measured in terms of the amount of land and water required to produce the resources we consume and to absorb the waste we generate.
Resources:
The Renewable resources are those that can be replenished and replaced naturally over time, example is solar energy, wind energy, and timber.
The Nonrenewable resources are those that cannot be replenished or replaced once they are used up such as fossil fuels and minerals.
More on Renewable energy ?Renewable energy is described as energy derived from natural sources that are replenished at a higher rate than they are consumed.
The Sunlight and wind are known example of such sources that are constantly being replenished.
In conclusion, renewable energy sources are plentiful and all around us.
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A period in history in which human transitioned from human power, animal power and hand made goods to fissile fuel power, hydro/hydroelectric power and machine produced goods.
A. The industrial revolution
B. The agriculture revolution
C. The medical revolution
D. The American revolution
3) Choose the correct answer.
The study of the surface and interior of the Earth is called
O life science
O social science
Ophysical science
O Earth science
The study of the surface and interior of the Earth is called Earth science.
What is Earth science?Earth science is the scientific study of the Earth and its physical components, including its geology, oceans, atmosphere, and the processes that shape and change them over time. It encompasses a wide range of scientific fields, including geology, oceanography, meteorology, climatology, and environmental science.
Earth scientists use a variety of methods and tools, such as fieldwork, laboratory analysis, remote sensing, and computer modeling, to better understand the Earth's systems and processes, and to address pressing societal issues related to the planet's natural resources, hazards, and sustainability.
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Which one of the following statements is false? Select one: a. The ovaries are almond shaped. b. The ovaries are suspended from the anterior aspect of the broad ligaments. c. The ovaries lie in the ovarian fossa. d. The ovaries receive blood from the ovarian and uterine arteries.
Answer:
d. The ovaries receive blood from the ovarian and uterine arteries.
Explanation:
All the other options are correct except option D.
The ovary is only supplied with oxygenated blood from the ovarian arteries. The uterine arteries supply blood to the uterus alone.