Answer:A checkpoint is a stage in the eukaryotic cell cycle at which the cell examines internal and external cues and "decides" whether or not to move forward with division.
Explanation: Easy Peasy
What is a photosytem
Answer:
Below
Explanation:
The light reaction of photosynthesis. ... High-energy electrons, which are released as photosystem I absorbs light energy, are used to drive the synthesis of nicotine adenine dinucleotide phosphate (NADPH). Photosystem I obtains replacement electrons from the electron transport chain.
How does the shape of the blood differ
in sickle cell versus beta thalassemia?
Answer: In sickle cell disease, the beta hemoglobin chain twists and changes the shape of the red blood cell. Normal red blood cells are round, like little frisbees. In sickle cell disease, the red blood cells are “sickled” in a croissant shape.
Skeleton in mammals
your Question is unclear.
Which are examples of structures composed of primary lymphoid tissue? Select all that apply.
bone marrow
tonsils
adenoids
thymus
lymph nodes
Answer: bone marrow and thymus
Explanation: its right.
Answer:
Yes, it is bone marrow and thymus. Got it right.
describe how charles sherrington used behavioral observations to infer the major properties of synapses
Why sun is considred as ultimate source of energy
Answer:
The Sun is the Ultimate Source of Energy. Every morning the sun rises, bringing light and heat to the earth, and every evening it sets.
your welcome
The microscopic filtering units found in the kidneys that are responsible for urine formation are called
Answer:
nephrons
Explanation:
there are about one million nephrons in one kidney which are responsible for urine formation
The microscopic filtering units found in the kidneys that are responsible for urine formation are called nephrons, so here the correct option is option a.
Throughout the nephron, various processes such as filtration, reabsorption, and secretion occur to produce urine. Filtration occurs at the glomerulus, where water and small solutes are forced out of the blood into the Bowman's capsule. Reabsorption involves the selective reabsorption of water, ions, and nutrients from the filtrate back into the bloodstream. Secretion involves the active transport of waste products, excess ions, and toxins from the bloodstream into the filtrate. So here, the correct option is option a.
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complete question is below
The microscopic filtering units found in the kidneys that are responsible for urine formation are called
A. nephrons
B. kidney
When compared to each other, the two replication forks that form at an origin of replication move in which direction? A. in the 3-to-5' direction B. toward the origin C. toward the template strand D. in opposite directions E. in the 5'-to-3' direction
D. in opposite directions. During DNA replication, the two replication forks that form at an origin of replication move in opposite directions.
The replication fork is the site where the double-stranded DNA is unwound, and the synthesis of the new strands of DNA takes place. The leading strand is synthesized continuously in the 5'-to-3' direction, whereas the lagging strand is synthesized discontinuously in the opposite direction, also in the 5'-to-3' direction. As the two replication forks move away from each other, the DNA strands ahead of them are continuously unwound, and new strands are continuously synthesized. The direction of replication is always in the 5'-to-3' direction, but the replication forks move in opposite directions away from the origin of replication, creating the replication bubble. Therefore, the correct answer is D. in opposite directions.
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How many Half-lives does it take for C14 to decay until 6. 25% remains?
It takes 4 half-lives for C14 to decay until 6.25% remains.
How to solve for the half lifeThe decay of C14 follows an exponential decay model, with a half-life of approximately 5,700 years. This means that after each half-life, half of the remaining C14 will have decayed.
To determine the number of half-lives it takes for C14 to decay until 6.25% remains, we can use the following formula:
N = N0 (1/2)^n
where N is the final amount of C14, N0 is the initial amount of C14 (which we can set to 100%), and n is the number of half-lives.
If we set N to 6.25%, or 0.0625, we get:
0.0625 = 1 (1/2)^n
Simplifying this equation, we get:
(1/2)^n = 0.0625
Taking the logarithm of both sides, we get:
n log(1/2) = log(0.0625)
n = log(0.0625) / log(1/2)
n = 4
Therefore, it takes 4 half-lives for C14 to decay until 6.25% remains.
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If you have ever dissolved salt in hot water, you have witnessed the effectiveness water has a solvent. Which of the following best explains how salt dissolves?
A. Water's ability to reheat keeps the salt moving.
B. Cohesive properties of water attract salt
C. Hot water melts salt
D. Polarity of water pull apart apart the salt molecule.
Answer: C. Hot water melts salt.
Explanation:
Because if I put hot water in a cup and poured salt into that same cup the salt is going to dissolve into the water, Because the water melts the salt.
Which of the following would best be mined using Hydraulic Mining?
Select one:
O a. Placer Deposits
O b. Magmatic Deposits
O c. Hydrothermal Deposits
O d. Residual Deposits
Answer:
c
Explanation:
hydrothermal deposits
Materials that allow the charges of an electric current to move freely through them are called a. Insulators. B. Conductors. C. Resistors. D. Magnets.
Answer:
B. Conductors
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With her?
61. what is stanley's gift to blanche for her "twenty-seventh birthday?
In Tennessee Williams' play "A Streetcar Named Desire", Stanley does not give Blanche a gift for her twenty-seventh birthday.
In fact, Stanley and Blanche have a very tumultuous relationship throughout the play, as they clash over their differing backgrounds and personalities. While Blanche is more refined and educated, Stanley is more rough around the edges and has a strong sense of masculinity. This clash ultimately leads to a violent confrontation between the two characters, with Stanley using Blanche's past as a way to discredit her and gain power over her. Therefore, there is no mention of Stanley giving Blanche a gift for her birthday in the play, as their relationship is too fraught with tension and conflict for such a gesture to take place.
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How are genetic relationships represented?
Answer:
Genetic relationships are analysed based on the comparison of allelic identity or differences, regardless of the number of SNPs that differ between two alleles of a gene, which simplifies the analysis.
Explanation:
Are the following statements regarding tidal volume (VT) true or false? O After a normal inspiration, it constitutes about 10% of the volume of air breathed out in a maximal exhale. O It is approximately 0.5 L in a healthy young adult. O It is the volume inhaled and exhaled during restful breathing,
After a normal inspiration, it constitutes about 10% of the volume of air breathed out in a maximal exhale is false. True statements about tidal volume are It is approximately 0.5 L in a healthy young adult and It is the volume inhaled and exhaled during restful breathing,
1) After a normal inspiration, tidal volume constitutes about 10% of the volume of air breathed out in a maximal exhale: False. Tidal volume typically makes up a larger percentage (about 20-25%) of the volume of air breathed out during a maximal exhale, known as vital capacity.
2) Tidal volume is approximately 0.5 L in a healthy young adult: True. In a healthy young adult, the tidal volume is usually around 0.5 liters during restful breathing.
3) Tidal volume is the volume inhaled and exhaled during restful breathing: True. Tidal volume refers to the amount of air that moves in and out of the lungs during normal, restful breathing.
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shine the uv light on the gel while the native proteins are separating. what do you see? why does this differ from what you see in the denatured protein lane?
When the native proteins are separating and we shine the UV light on the gel, the bands are faint. The reason is that native proteins maintain their three-dimensional shape, which enables them to fold back on themselves and protects their hydrophobic core from interaction with the negatively charged SDS molecule.
The SDS-PAGE buffer has a denaturing agent, which causes the protein to denature, lose its three-dimensional shape, and have a uniform negative charge distribution.The migration of proteins that are exposed to a denaturing agent, such as sodium dodecyl sulfate, is based on the length of their polypeptide chains. The bands are darker when proteins are denatured because the denaturation process eliminates their tertiary structure and results in a uniform negative charge distribution, making the SDS-protein complex size-dependent. As a result, the negatively charged SDS binds to the protein, giving it a negative charge, which causes it to migrate through the gel at a rate proportional to its length and charge-density.
Hence, we can conclude that native proteins maintain their three-dimensional shape, and the SDS-PAGE buffer has a denaturing agent that causes the protein to denature, lose its three-dimensional shape, and have a uniform negative charge distribution, which is the main reason for the difference in what we see in the denatured protein lane compared to the native protein lane when we shine the UV light on the gel.
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difference between animal cells and plants cells
Answer:
A plant cell have a vacuole, chloroplasts and A cell wall
Vacuole - Gives the cell shape
Chloroplasts - Contain a green pigment (turns the plant green) To do with photosynthesis.
Cell Wall - Holds the cell up and keeps it in a rigid structure.
Is global warming natural or manmade?
Answer: Global warming is manmade
A group of individuals becomes lost at sea and gets stranded on an island where they begin their own population this is an example of which of the following ?
This is an illustration of the Founder Effect. In this case, the Founder Effect is clear.
What exactly is the Founder Effect?Furthermore, it differs with the Law of Segregation, a fundamental genetics principle that states that each person has two copies of each gene and that during the formation of gametes (sex cells), these copies are separated and passed down to children independently.
The Founder Effect outlines the process by which a small group of people separated from a larger population become a new population. This can occur if a group becomes geographically isolated, such as being marooned on an island, or if they become separated from other tribes due to migration or colonisation.
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Which of the following processes releases carbon dioxide as waste?
Cell division
Cellular respiration
Photosynthesis
Transpiration
Answer:
The answer is Cellular Respiration
opportunistic pathogens question 4 options: a) cause disease in every individual. b) cause disease in compromised individuals. c)
Opportunistic pathogens cause disease in compromised individuals.
B is the correct answer.
Opportunistic pathogens are bacteria that, while typically causing no disease in healthy humans, can become virulent in immuno-compromised and unwell people. In recent decades, a number of bacteria that are often found in food have turned into opportunistic pathogens in both people and animals.
Opportunistic infections (OIs) are infections brought on by bacteria, fungi, viruses, or parasites that ordinarily do not spread disease but instead develop into a disease when the body's defence mechanism is compromised. Infections that are exceptionally severe yet are brought on by common organisms might also be considered OIs.
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The complete question is:
opportunistic pathogens question 4 options: a) cause disease in every individual. b) cause disease in compromised individuals. c) cause disease in healthy individuals d) do not cause any disease
Is aquarium water isotonic to cytoplasm of elodea cell
Elodea is a type of aquatic plant commonly used in biology labs for its easily observable cells. Elodea cells are typically rectangular or box-shaped and contain a large central vacuole, chloroplasts, and a cell wall. Isotonic refers to a solution with the same concentration of solutes as the cytoplasm.
Aquarium water is isotonic to the cytoplasm of an elodea cell. Isotonic refers to having the same concentration of dissolved substances as another solution. The cytoplasm of an elodea cell and aquarium water have similar concentrations of dissolved substances, such as salts and minerals, making them isotonic to each other. This allows for proper osmotic balance and cell function in the elodea cell when it is submerged in aquarium water. The concentration of solutes in aquarium water can vary and may be hypotonic or hypertonic compared to the Elodea cell's cytoplasm, depending on factors such as water quality and added substances.
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investigate bees play an important role in pollination
Answer:
Bees play an important part by pollinating. If there were no pollen, that means most flowers would die off. The worst if it is that some medicine comes from these flowers
what is the difference between mutagens and carcinogens?
Mutagens and carcinogens are two different types of substances that can cause genetic changes and lead to cancer.
Mutagens are substances that cause changes in the DNA sequence, while carcinogens are substances that can cause cancer to develop. Although both mutagens and carcinogens are related to cancer, there are some differences between them.
Mutagens are substances that cause mutations or changes in the DNA sequence. Mutations can be beneficial or harmful. When beneficial, they can help organisms evolve and adapt to new environments. When harmful, they can cause diseases such as cancer. Mutations can occur naturally or as a result of exposure to mutagens such as chemicals, radiation, or viruses.
Carcinogens, on the other hand, are substances that can cause cancer. They can damage DNA, disrupt cellular processes, and cause cells to grow and divide uncontrollably. Carcinogens can be found in a wide range of substances, including tobacco smoke, certain chemicals, radiation, and viruses.
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What are villi?
don't spam
Answer:
Villi are finger-like outgrowths on the inner walls of the small intestine. The villi increase the surface area for absorption of the digested food.
Answer:
Villi are tiny finger-like projections seen in the small intestine. They are more than millions of villi in the small intestine performing the following functions: The villi absorb nutrients from the food and cause their conversion into glucose.
do you support the lgbtg community
Answer: No
Explanation:
I hope it dies
g the increase in action potential conduction velocity due to myelination can best be explained by which of the following? a. a decrease in membrane capacitance. b. a decrease in membrane resistance. c. a decrease in longitudinal resistance.
The best can be explained as "the increase in action potential conduction velocity due to myelination" is a decrease in membrane capacitance.
What happened if the resistance of the membrane is increased?If the resistаnce of the membrаne is increаsed, more of the depolаrizing current pаsses down the аxon аnd dischаrges the cаpаcitor on the membrаne. Thus insulаting the membrаne with myelin increаses the pаssive spreаd of current аnd increаses conduction velocity. Decreаsing the membrаne cаpаcitаnce аlso increаses conduction velocity. Аdding myelin increаses the thickness of the membrаne cаpаcitor, which decreаses its cаpаcitаnce. Increаsing the diаmeter of the аxoplаsm decreаses the internаl resistаnce, which fаcilitаtes pаssive spreаd of current аnd increаses conduction velocity.
Thus, the correct answer is A.
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Digestive juices are incredibly strong, how does the stomach protect itself from also being digested?
Protective mucus
Extra layers of skin
It doesn't
Bile produced by the gallbladder
Answer:
Protective mucus
Explanation:
The mucus covers the stomach wall with a protective coating. Together with the bicarbonate, this ensures that the stomach wall itself is not damaged by the hydrochloric acid
25 points answer ASAP
Isle Royale National Park is an island Archipelago (a chain of islands) located on Lake Superior in Michigan. Park officials first observed wolves on the island in the 1940s after they crossed an ice-bridge from Canada. Ice-bridges occur when the lake water between the islands and Canada freeze over in the winter. When they are frozen the wolves can walk to the island from Canada. On Isle Royale, these wolves are the only predator for the Bull Moose. Because this is an island system, scientists have an opportunity to study long-term population interactions with large mammals.
Figure 1. Wolf (left) and Bull Moose (right). Photo Credit: NPS Photo/Paul Brown
Using the current class consensus model, predict three factors that would affect the Bull Moose population
The Isle Royale wolf population has changed since its first arrival in the late 1940s. The wolf population declined drastically in 1980 and again in 2012 due to a combination of reasons including disease, climate change, chance, and genetic diversity loss.
Isle Royale National Park is an American national park in Michigan that encompasses Isle Royale, originally known as Minong to the original Ojibwe, as well as approximately 400 additional neighbouring islands and Lake Superior's surrounding seas.
Isle Royale is 45 miles (72 kilometres) long and 9 miles (14 kilometres) wide, making it the world's fourth-largest lake island at 206.73 square miles (535.4 square kilometres). It is also the largest natural island in Lake Superior, the second-largest in the Great Lakes (after Manitoulin Island), the third-largest in the contiguous United States (after Long Island and Padre Island), and the world's 33rd largest island.
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if you drop a human cell into pure water in a petri dish, water molecules will pass into the cell membrane, causing the cell to swell or sometimes even burst if it has no active mechanism to expel the water. what process is happening here?
The process is happening when we drop a human cell into pure water in a petri dish, water molecules will pass into the cell membrane is osmosis.
Osmosis is the spontаneous net movement or diffusion of solvent molecules through а selectively permeаble membrаne, in the direction thаt tends to bаlаnce the solute concentrаtions on the two sides, from а region of high wаter potentiаl (region of lower solute concentrаtion) to а region of low wаter potentiаl (region of higher solute concentrаtion).
In the case above, a human cell isа region of high wаter potentiаl and pure water is а region of low wаter potentiаl. It makes water molecules will pass into the cell membrane, causing the cell to swell or sometimes even burst if it has no active mechanism to expel the water.
Your question is incomplete, but most probably your full options were
a. metabolism
b. diffusion
c. osmosis
d. cellular respiration
Thus, the correct option is D.
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