a powerful storm dislodged vegetation rafts containing a few impatiens plants, dispersing them to a nearby island. soon after the plants were established, all three flower colors were seen. however, 20 generations later, only impatiens with white flowers were found on the small island. during the next decade several hurricanes in the area caused more plants of this impatiens species to be dispersed to the same small island, after which all three flower colors were seen there again. unfortunately, two years later a volcano erupted, wiping out 99% of the impatiens population on the island. sequence these processes in the order in which they occurred in the scenario.
Answers
When a population is drastically reduced in number from the main population to establish a colony, significant impacts dominant allele. The allele population brought on by a population.
The graph displays the dominant allele that is undergoing genetic drift, in which the frequency fluctuates or simply decreases until it is gone. The frequency of the dominant allele increases after the entry of additional population carrying the dominant allele, albeit it doesn't always reach or stop at 50%. To see homozygous dominant (red) and heterozygous (pink) flowers population , the dominant allele's frequency must be high enough.
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Related Questions
Biodiversity and Succession in Environments (7.10 B & C)::Question 5
Woodpeckers live in forests, backyards and various other types of
habitats. Which would most likely cause a decrease in the number of
woodpeckers in an ecosystem?
Select one
building a road around a small forest
destroying all dead trees and stumps
plowing and planting meadows
draining a spring-fed pond
Answers
Answer:
Atherosclerosis increases resistance and decreases blood flow.
Explanation:
Just did the study Island
Answer:
Atherosclerosis increases resistance and decreases blood flow..
Explanation:
Just did the study Island.
Consider the following experiment. First, large populations of two mutant strains of Escherichia coli are mixed, each requiring a different, single amino acid. After plating them onto a minimal medium, 45 colonies grew. Which of the following may explain this result?
(A) The colonies may be due to back mutation (reversion). B) The colonies may be due to recombination.
C) Either A or B is possible.
Answers
The correct option is (C) Either A or B is possible. A minimal medium is used to grow Escherichia coli strains of two different mutations. After that, the strains are mixed, and a total of 45 colonies are obtained. This might be due to either back mutation or recombination.
In biology, colonies are a community of microorganisms, such as bacteria or yeast, that grow together. Microbiologists refer to bacteria as "colony-forming units" (CFUs), which are clusters of cells that are genetically identical.
A small number of bacteria or fungi present in a sample will be plated out to grow into a colony. The colony is made up of billions of genetically identical cells, making it a pure culture. To separate different bacterial species, microbiologists can rely on the shape, color, size, and other characteristics of colonies.
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click and drag to show which gene products are required for each phase of the crispr-cas defense system in bacteria. if a product is required for more than one phase, drag it to each phase.
Answers
The gene products that are required for each phase of the crispr-cas defense system in bacteria are as follows
1. Adaptation: 2. Expression: 3. Interference:
a. Cas2 b. tracrRNA d. Cas9
f. Cas1 c. pre-crRNA e. crRNA
d. Cas9
e. crRNA
What should you know about the crispr-cas defense system?a brief overview of each phase of the CRISPR-Cas defense system;
In the adaptation phase, the bacteria acquire a new spacer sequence from a virus or phage. The spacer sequence is then integrated into the CRISPR locus, which is a region of DNA that contains a copy of all the spacers that the bacteria has acquired.
In the expression phase, the CRISPR locus is transcribed to produce a pre-crRNA. The pre-crRNA is then processed to produce a crRNA.
In the interference phase, the crRNA binds to Cas9, which is a protein that can cleave DNA.
The above answer is based on the full question below;
click and drag to show which gene products are required for each phase of the crispr-cas defense system in bacteria. if a product is required for more than one phase, drag it to each phase.
1. Adaptation
2. Expression
3. Interference
a. Cas2
b. tracrRNA
c. pre-crRNA
d. Cas9
e. crRNA
f. Cas1
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Explain how in an electrical system like wires going from a plant to a house, there is less electrical energy at the end of the chain (the outlet in the house) compared to at the plant. How does this connect to, contradict or explain the law of conservation of energy which states that energy cannot be created nor destroyed. The answer should be 10-15 sentences long.
Answers
Answer:
According to the law of conservation of energy, energy cannot be created or destroyed, although it can be changed from one form to another. KE + PE = constant. A simple example involves a stationary car at the top of a hill.
The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another. This means that a system always has the same amount of energy, unless it's added from the outside. The only way to use energy is to transform energy from one form to another.
Similarly, the law of conservation of energy states that the amount of energy is neither created nor destroyed. ... For example, when you roll a toy car down a ramp and it hits a wall, the energy is transferred from kinetic energy to potential energy.
Explanation:
Why are index fossils helpful?
A.Since they are only from a specific time period, the rock layer they are found in, and all
fossils within it, must also be from that time period. This helps scientists date fossils.
b. They are the only radioactive fossils and so help scientists find its specific age
c. They never break down, like other fossils, so they are a permanent glimpse into
history.
Answers
Answer:
A
Explanation:
biofilm occurs least frequently: group of answer choices on proximal surfaces. at the gingival margin. around the gingival third of the tooth. on anterior surfaces.
Answers
a cell that protects the body by eating invading cells
Answers
Answer:
macrophage
Explanation:
A bacterial cell has been genetically modified to have a plasmid that contains a gene that codes for human growth hormone (HGH). Which of these statements correctly assesses what happens with the bacterial cell after transformation with the plasmid? You may select all that apply
A) the original bacterial cell will produce HGH
B) the offspring of the transformed bacteria will produce high HGH
C) HGH can be isolated from bacterial cultures and used as a pharmaceutical
D) the bacteria will not be able to replicate the plasmid and cannot express the gene
E) the bacterial cell can replicate the plasmid but will be unable to transcribe and translate the gene
Answers
Answer:
A) the original bacterial cell will produce HGH
B) the offspring of the transformed bacteria will produce high HGH
C) HGH can be isolated from bacterial cultures and used as a pharmaceutical
Explanation:
Hope this helps :)
The plasmid is the circular extrachromosomal DNA that is used in genetic engineering. In the given scenario the original bacterial cell will produce HGH, it can be isolated from bacterial cultures, and the offspring of the transformed bacteria will yield high HGH.
What is genetic engineering?Genetic engineering is the process that uses technologies that are laboratory-based to alter the DNA buildup of an organism.
It involves modification through plasmids also which are used to transfer the foreign sequences to different cell types.
The plasmid is inserted through transfusion in bacteria.
In the given scenario, after genetically modifying, the human growth hormone, the following can be the consequence.
The original bacterial cell will produce HGH.The offspring of the transformed bacteria will produce high HGH.HGH can be isolated from bacterial cultures and used as a pharmaceutical.Thus, the correct options are A, B, and C.
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Disadvantage of asexual reproduction
Answers
All offspring will be identical to the parent, meaning there will be no genetic variation.
Starting with the european settlers, humans have introduced earthworms from europe and asia into north american forests. these introductions continue through the transport of soil that contains non-native earthworms, such as during construction and through the release of non-native earthworms used for fishing. the effects of non-native earthworms are especially large in forests that did not have any native earthworms. for example, forests of the great lakes region did not previously have earthworms until humans introduced them. when non-native earthworms are introduced, the thick layer of leaves, known as leaf litter, covering the ground disappears quickly, thereby altering biogeochemical cycles. what is a possible negative consequence of introducing the non-native earthworms to forests in the great lake regions?
a. the earthworms reduce the resources available to other animals that eat dead plant matter.
b. the earthworm decreases the energy flow from one tropic level to the next.
c. the earthworms provide an additional food source for primary consumers.
d. the earthworms burrow, which reduces the nutrients, flow of air, and water underground.
Answers
The possible negative consequence of introducing the non-native earthworms to forests in the great lake regions is option a. the earthworms reduce the resources available to other animals that eat dead plant matter.
Why the negative consequence above?When non-native earthworms are introduced, they consume the leaf litter that covers the ground, which can alter the biogeochemical cycles in the ecosystem.
Therefore, This can have negative impacts on other animals that depend on the leaf litter for food or habitat. Additionally, the burrowing activity of earthworms can also disrupt the flow of nutrients, air, and water underground, which can have further impacts on the ecosystem.
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Which blood component fights and destroys disease-causing bacteria and
viruses?
Answers
Answer:
white cells
Explanation:
Need immediate help!!
Answers
Answer:
A
Explanation:
The cell would likely not have fewer chromosomes than the parent because those cells are formed from nondisjunction and not base mutations and those cells are usually not viable
the cell would not produce more proofreading proteins to eliminate future mutations --> the concentration of proofreading proteins does not change in response to a singular mutation
the cell would not be more likely to have an environmental mutation because those occur at random
The layer of the meninges that closely follows every gyrus and sulcus is the___. a. neural cortex. b. pia mater. c. dura mater. d.subarachnoid mater. e. arachnoid membrane
Answers
The cranial dura mater is the outermost covering of the meningeal layer, consisting of dense irregular connective tissue.
Meninges are divided into two types: those that surround the brain and those that envelop the spinal cord. In contrast, the cranial and spinal meninges are contiguous and have the same three meningeal layers.
These layers divide three clinically important potential spaces: the epidural, subdural, and subarachnoid. The meninges are three membranes that envelop and divide the brain and spinal cord from the bony cases that house them.
The meninges shield the brain and spinal cord from mechanical trauma, serve as a support for blood vessels, and create a continuous cavity through which cerebrospinal fluid (CSF) flows.
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If the diploid number of a giraffe is 58, then the haploid number is __________________.
23
46
29
116
Answers
Answer:
C. 29
Explanation:
the haploid number is always half of the diploid number so half of 58 is 29
Scenario A: Setsuko reads an article in Skincare magazine warning about the use of a new herbal skin cream that may cause redness, swelling, and irritation.
Scenario B: Cicely reads an article in the Thai Journal of Pharmaceutical Sciences stating that herbal skin creams that contain aloe vera cause less irritation than those without it.
Which article is more likely to have been peer-reviewed? How do you know?
Answers
Article B may be peer revied. Because it is showing the herbal cream that contains aloe vera.
What is skin cream?The understated houseplant aloe vera is a "miracle," or wonder plant, frequently hiding in plain sight. It has long been used as a medicinal plant and nourishes the body from the inside out.
Aloe Vera gel is anti-inflammatory and has cooling effects. As a result, it is one of the most organic treatments for burned or sunburned skin. Applying this gel helps the skin retain moisture and creates a protective layer for the skin.
It is abundant in minerals and antioxidants, both of which speed up the healing process. Aloe Vera is now well acknowledged to be quite helpful for burns, cuts, and other wounds. This is due to the fact that aloe vera speeds up and shortens the healing process for wounds.
Therefore, Article B may be peer revied. Because it is showing the herbal cream that contains aloe vera.
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Who’s know stuff about child development?
Answers
The child development stuff is well known to the doctors and the nurse, and they advise mothers during the time of the pregnancy to take care of the baby in different ways.
What is the role of the medical staff?The medical field employs a variety of personnel, including doctors, experts, nurses, caregivers, and others, but the doctor and nurse roles are directly related to patients. They take care of patients of different types, such as those with minor to major health issues.
Hence, the child development stuff is well known to the doctors and the nurse, and they advise mothers during the time of the pregnancy to take care of the baby in different ways.
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What is the maximum recommended temperature for the hottest temperature run (\#9)? 15 degrees above room temperature 30 degrees above room temperature: 10 desrecs above room tempcrature 20 degrees abovo room temperature
Answers
The maximum recommended temperature for the hottest temperature run (#9) is 20 degrees above room temperature.
The maximum recommended temperature for the hottest temperature run (#9) is 20 degrees above room temperature. This means that the machine should not be operated at a temperature higher than 20 degrees Celsius (68 degrees Fahrenheit) when conducting the hottest.
This is important because higher temperatures can cause the machine to overheat and potentially damage the components. It is important to follow the manufacturer's instructions and guidelines for safe operating temperatures to ensure the longevity.
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Given that we know that not all DNA will code for a protein, what is the function of the noncoding region of DNA?
Answers
Answer:
Many regions of noncoding DNA play a role in the control of gene activity, meaning they help determine when and where certain genes are turned on or off. Other regions of noncoding DNA are important for protein assembly
What is the net production of atp molecules per glucose molecule in the muscles if glycogen is the source of the glucose?.
Answers
3 mol
The net production of ATP molecules per glucose molecule in the muscles if glycogen is the source of the glucose is 3 mol.
NADH is converted to NAD+ via the conversion of pyruvate to lactate, which is catalyzed by lactate dehydrogenase, in order to maintain the oxidation of glucose and the net yield of 2 ATP per mol of glucose oxidized (or 3 mol of ATP if the source is muscle glycogen).ATP stands for Adenosine triphosphateThe following reaction occurs in the muscles when glycogen is broken down:
(Glucose)n + Pi → Glucose-1-phosphate + (Glucose)n-1
How much ATP is produced when glucose is converted to glycogen?2 ATP is produced when glucose is converted to glycogenFor every glucose molecule to be converted into a molecule of glycogen, two ATP are needed.How is ATP produced from glycogen?Adenosine triphosphate (ATP) molecules are needed for muscle contraction, and they are produced by the oxidation of glucose by the muscle cells during anaerobic and aerobic processes. Muscle glycogen particles are broken down during intense, intermittent exercise and throughout prolonged physical activity.To learn more about glycogen breakdown visit:
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What's another term for "Healthy Carrier"
Answers
Answer:
here are some Synonyms for Healthy carrier
Synonyms
ailment.
complaint.
disorder.
ill.
illness.
infirmity.
malady.
sickness.
Explanation:
16. Primary lesions include:
a. Pimples, freckles and mosquito bites
b. Tertiary and vascular lesions
c. Scabs, scars, and dandruff
d. All dermatological conditions
Answers
Primary lesions are those which emerge when an individual develops a dermatological condition. A dermatological condition is one which causes changes to the skin. As a result, an individual is said to have a primary lesion when they have a skin condition. With that being said, pimples, freckles, and mosquito bites are all considered primary lesions. Therefore, option A is the correct answer.
Primary lesions are the very first stage of a skin disorder and are caused by the underlying pathogenic mechanism. They can develop from apparently healthy skin or preexisting lesions that have evolved over time. These marks are usually flat, raised, or bumpy.
Primary skin lesions are classified as follows:
Macules: Macules are small, flat spots on the skin that are less than 1 cm in diameter. They are typically brown, white, or red and can be either genetic or caused by a skin disease.Papules: Small, solid, elevated masses are known as papules. They are frequently colored, with redness and swelling, and can appear on the skin due to a variety of causes. Some examples include lichen planus, eczema, or psoriasis.Vesicles: Vesicles are small, fluid-filled blisters that can be itchy and painful. They may develop due to infection or as a symptom of skin disease such as herpes simplex.Urticaria (hives): Urticaria or hives are itchy, raised, red welts that develop suddenly and can change shape or location. They occur when the skin reacts to an allergen or irritant.To know more about dermatological condition
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50 PTS
ILL GIVE YOU BRAINLIEST PLEASE ANSWER CORRECTLY AND QUICK
Which moon phases and tide is occuring? (Choose two answers)
1st quarter moon
3rd quarter moon
Neap Tide
Spring tide
Answers
Answer:
first quarter and neap tide
Answer:
first quarter and neap tide
Explanation:
What would happen to a cell that didn’t replicate its dna before cell division?
Answers
The cell will not proceed with the further processes.
What is equational division?
Chromosome replication and equal distribution between the two daughter cells occur during the cell division process known as mitosis. Each daughter cell has the same number of chromosomes as the parent cell, making them diploid. Thus, mitosis is also referred to as equational division.
Unequal division will result if the cell didn't replicate prior to actually cell division. As a result of the checkpoints, it won't move on to the next step. The checkpoint will later start the apoptosis process, which results in programmed cell death.
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Which product of respiration is considered waste material and leaves the alveoli?
O oxygen
O water
O carbon dioxide
O carbon monoxide
Answers
Answer:
In our respiratory system, carbon dioxide is the waste material that we expel when we breathe out. The answer is C, Carbon Dioxide
I hope you have a great day!
The waste product of respiration is
C. Carbon dioxide
The oxygen consumed via stomata is used up by cells.
Respiration in leaves:Oxygen from the air enters a leaf through stomata and reaches all the cells by the process of diffusion. This oxygen is used in respiration in cells of the leaf. The carbon dioxide produced during diffuses out from the leaf into the air through same stomata. The oxygen used by cells in the leaves to disintegrate glucose into water and carbon dioxide.
Thus, option C is correct.
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Organisms contain different levels of organization within their bodies. Arachnoidiscus ehrenbergi, pictured below, is a single-celled organism that is part of the group of algae known as diatoms. A microscopic image of Arachnoidiscus ehrenbergi. Photo by Gordon T. Taylor, courtesy of the NOAA Which level of organization is seen in both Arachnoidiscus ehrenbergi and the human stomach? cell tissue organ organ system Mark this and return
Answers
The correct answer is the cell.
Since Arachnoidiscus ehrenbergi is a single cell organism the only level its of organization is cell. Human stomach is composed of many different types of cells which combine together in order to perform complex functions. Those cells are arranged in tissues which make an organ-stomach.
hope it helps!
The level of organization displayed by both Arachnoidiscus ehrenbergi and the human stomach would be the cell.
Since it has already been established that Arachnoidiscus ehrenbergi is a single-celled organism, it can only exhibit a cellular level of organization.
The human stomach, in a similar vein, is made up of different cells. One group of such cells are secretory epithelial cells. They include the mucous cells, parietal cells, chief cells, and so on.
Thus, Arachnoidiscus ehrenbergi and the human stomach have the capacity to exhibit a cellular level of organization.
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The force exerted outward on a plant cell wall by the water contained in the cell is called______pressure.
Answers
The force exerted outward on a plant cell wall by the water contained in the cell is called Turgor pressure.
Turgor pressure, which affects bacteria, fungus, and plants, often results from the osmotic movement of water. Moreover, protists with cell walls exhibit the phenomena. Animal cells do not use this method because they lack a cell wall, which would allow excessive pressure to cause the cell to lyse.
Cell walls and vacuoles are two essential components that plants require to maintain the ideal mechanism for regulating turgor pressure inside the cells.
Turgor pressure serves the important purpose of encouraging cell volume expansion, and the larger the turgor pressure, the larger will be the leaf expansion. Osmotic potential and water potential both influence how much turgor pressure is present.
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2. A bottle is filled with 22g of olive oil which has a density of 0.925g/cm3. What is the volume of the olive oil to the nearest cm3?
Answers
Answer:
24cm³
Explanation:
density = mass/volume
0.925 = 22/volume
volume = 22/0.925 ≈ 23.783 ≈ 24cm³
13. are the proposed cfc replacements themselves greenhouse gases? why is their emission considered to be less of a problem in enhancing the greenhouse effect than was that of the cfcs themselves?
Answers
Yes, the proposed CFC replacements themselves are greenhouse gases.
The emission of these replacement gases is considered to be less of a problem in enhancing the greenhouse effect than was that of the CFCs themselves due to their shorter lifetimes in the atmosphere and lower global warming potentials.
CFCs have been found to be highly effective at destroying the ozone layer, which protects the earth from harmful UV radiation.
As a result, they have been phased out as refrigerants and other uses. However, the replacements for CFCs, such as hydrochlorofluorocarbons (HCFCs) and hydrofluorocarbons (HFCs), are themselves greenhouse gases.
HCFCs and HFCs have shorter lifetimes in the atmosphere and lower global warming potentials than CFCs, which means that their effects on climate change are less severe.
While they are not ideal replacements, they are currently the best options available for many uses, and efforts are being made to find alternatives that are even less harmful to the environment.
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Which region of a functional immunoglobulin would most likely contain variations in amino acid sequences to form the kappa or lambda chains of a functional Ig molecule?
Constant light chain regions
Variable heavy chain regions
Constant heavy chain region CH1
Constant heavy chain region CH2
Variable light chain regions
The variable domain of an Ig molecule is made up of:
a. only the N-terminal region of a light chain polypeptide
b. only the N-terminal region of a heavy chain polypeptide
c. both the C-terminal regions of the heavy and light chain polypeptides
d. the N-terminal regions of both light and heavy chain polypeptides
e. only the C-terminal regions of both heavy chain polypeptides
Which of the following DNA regions in an RSS would contain an A-T rich sequence?
a. the nonamer
b. a 12-base pair spacer
c. a 23-base pair spacer
d. the heptamer
e. both the nonamer and heptamer regions
Answers
The region of a functional immunoglobulin that would most likely contain variations in amino acid sequences to form the kappa or lambda chains of a functional Ig molecule is the variable light chain regions. This is because the variable light chain regions are responsible for the specificity of an antibody and are therefore subject to a high degree of variability in order to recognize a wide range of antigens.
The variable domain of an Ig molecule is made up of the N-terminal regions of both light and heavy chain polypeptides (option d). This is because the variable domains are responsible for antigen recognition and binding, and therefore need to be highly variable in order to recognize a wide range of antigens.
The DNA region in an RSS that would contain an A-T rich sequence is the nonamer (option a). This is because the nonamer region is located at the 3' end of the RSS and is responsible for directing the recombination process. The A-T rich sequence in the nonamer region is important for the binding of the RAG proteins, which are responsible for the recombination process.
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when a motor neuron sends only one ap to the neuromuscular junction, what would you observe in most muscles in vertebrates
Answers
When a nerve impulse arrives at the neuromuscular junction, hundreds of small vesicles (pouches) containing the neurotransmitter acetylcholine are released from the axon tip into the synapse.
A synapse is formed when the tip of each axon comes into contact with a muscle fiber. A neuromuscular junction is a type of synapse that connects a motor neuron axon to a muscle fiber.
The musculature of vertebrates is often classified into three categories based on its microscopic structure: striated, cardiac, and smooth muscle. The involuntary, or autonomic, nervous system controls smooth and cardiac muscle.
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