The Retinoblastoma (Rb) protein blocks cells from entering the cell cycle by inhibiting cyclin transcription. Rb acts as a tumor suppressor protein that plays a crucial role.
in cell cycle regulation, preventing cells from progressing to the S phase when conditions are unfavorable. It achieves this by binding to and inhibiting the activity of E2F transcription factors, which are responsible for the transcription of cyclins and other cell cycle proteins. When Rb is phosphorylated by Cyclin-CDK complexes, it releases E2F, allowing the cell to progress through the cell cycle. Maintaining proper Rb function is essential to prevent uncontrolled cell proliferation and the development of cancer. Watch how you pronounce. the biological process by which a cell copies a section of DNA into an RNA copy. This RNA copy, sometimes referred to as messenger RNA (mRNA), carries the genetic material necessary for a cell to produce proteins.
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The appendix, an extension of the large intestine appears, although this is debated, to have little
function in humans. What is the appendix an example of in terms of evidence for evolution?
Answer: Vestigial organ
Explanation:
Vestigial organs are those organs which were functional in ancestral organisms belonging to the same species but due to the course of evolution of body forms they become non-functional. They can be found in the body either in the same form as used to appear in the ancestors or in rudimentary or degenerated forms.
The human appendix is one of the examples of vestigial organs. It looks like a narrow tube which forms a link with a colon of the large intestine. It was functional in human herbivorous ancestors as it used to help in digestion of variety of vegetables and other plant products. The change of diet along with due course of evolution caused the appendix to become useless. But the appendix physical form remained the same in humans.
what reaction is degradative
Simple sugar dehydration–fragmentation products, such as derivatives of furans, pyrones, cyclopentenes, carbonyl compounds, or acids
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please brainliest :)
Answer:
Degradation reactions reduce the number of atoms in a molecule through a specific type of chemical transformation.MARK ME AS BRAINLIST3. What might happen to the ecosystem if this population were removed?
Answer:
More predators kill more prey, which, along with food scarcity, decreases the population.
Explanation:
Answer: ''Population Explosions The most obvious result of the removal of the top predators in an ecosystem is a population explosion in the prey species. ''
Explanation:
Describe how you will estimate the rate of photosynthesis.
Explanation:
there are various methods to measure photosynthesis: Uptake of CO2 by plants: Since CO2 is needed for photosynthesis, measuring how much of it is taken up by the plants gives us information on how much of photosynthesis is happening. Release of O2: The amount of O2 produced during photosynthesis can be measured.
Estimation or measuring the rate of photosynthesis can be done by:
by the production of oxygenthe uptake of carbon dioxideIndirectly by an increase in biomass.The rate of photosynthesis is a gross measure of the rate at which a plant captures radiant energy and fixes it in organic carbon compounds. It can be estimated by:
Depletion of the substrate that is carbon dioxide, has been used or how much water is used.the accumulation of oxygen is a measure of the rate of reaction.measure the rate of photosynthesis in leaves by observing the release of oxygenThus,
Estimation or measuring the rate of photosynthesis can be done by:
by the production of oxygenthe uptake of carbon dioxideIndirectly by an increase in biomass.Learn more:
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true or false: alleles for the same trait are at different locations on homologous chromosomes
Answer:
TRUEExplanation:
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Please help due in 10 minutes!!!
Explain the 5 ways to reach Hardy-Weinberg equilibrium, does this mean evolution is occurring?
There are five basic Hardy-Weinberg assumptions: no mutation, random mating, no gene flow, infinite population size, and no selection. If the assumptions are not met for a gene, the population may evolve for that gene (the gene's allele frequencies may change).
can y’all help me please? thanks :)
Answer:
to protect you from mRNA vaccines
Write a small paragraph explaining how metamorphic rocks form and what they are like.
Include the following words in your paragraph:
Heat
Pressure
Context and regional metamorphism
Foliated
Non foliated
Answer:
Metamorphic rocks started out as some other type of rock, but have been substantially changed from their original igneous, sedimentary, or earlier metamorphic form. Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors.
Answer:
Metamorphic rocks started out as some other type of rock, but have been substantially changed from their original igneous, sedimentary, or earlier metamorphic form. Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors.
Explanation:
HELPPP!!! I'm confused!!
option c
Glycolysis , Krebs cycle , electron transport chain
On a hot, steamy, summer day, Kelly noticed that the outside of her glass of iced tea was very wet. She wondered if her glass was leaking. What do you think?
The population of most cities are numbered in _____________
Explanation:
muchos miles, y aveces cientos de miles
Some research studies claim that a person with antisocial personality disorder will not have a(n) __________ in stress hormone levels when under __________.
decrease . . . medication
increase . . . stress
decrease . . . stress
increase . . . medication
Answer:
B. Increase...stress
Explanation:
Correct on Edg 2021
Some research studies claim that a person with an antisocial personality disorder will not have a(n) increase in stress hormone levels when under stress. Option B.
What is an antisocial personality disorder(Disease)?Generally, An antisocial personality disorder is simply a personality disorder marked by persistent antisocial, irresponsible actions
In conclusion, Patients are always violent, with disdain for any hurt or pain given to others, and an inability to sustain long-term social and personal connections.
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Compare the palisade layer and the spongy layer of the mesophyll. Of the two layer, which layer has more cells?
Answer:
Palisade cells are packed tightly together, and most of the plant's photosynthesis is carried out in this sub-tissue. Moreover, cells in palisade mesophyll have a characteristic cylindrical shape and many chloroplasts. In spongy mesophyll cells, there are many air spaces, and the cells have slightly thinner cell walls.
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When talking about the products of photosynthesis, why is it a HUGE issue when a vast amount of the rainforests is dying along with vast amounts of forests from fires/deforestation? Remember, we know that this hurts the ecosystems of animals living there, but what else does it effect?
Question 5 options:
the creation of carbon dioxide
the creation of carbon monoxide
the creation of too much smoke
the creation of oxygen
Answer: the creation of oxygen
Explanation:
took the K12 Quiz (Note: not to sure its right if it aint so so sorry!)
Please please please help me
Answer:
B. Electrical energy is being transformed into thermal energy
Explanation:
The energy provided by the socket is electrical and is then transformed into thermal so the hair can be dried.
Which of these provides the best evidence that an environmental change has occurred?
Answer:
c
Explanation:
Marine fossils as their name say are should usually be in the ocean. not in a freshwater lake
Hope this helps
22. Jose plays the piano extremely well, but his parents do not play at all. What types of trait is playing the piano? A. Inherited B. Dominant C. Acquired D. Recessive
Answer:
I´m pretty sure its C
Explanation:
sorry if im wrong tho
Answer:
The Answer would be C
Explanation:
You cant inherit a skill you have to learn/acquire it.
What can you conclude about the effect of exercise on breath rate? Why is this so?
Explanation:
With exercise, cells need more oxygen, so the breath rate increases to provide the oxygen needed
What sort of evidence would support at least one of the components of cell theory ? a Rocks and other non-living things are not composed of cells b A microscope is necessary to make observations of nearly all cells c Cells are observed converting one form of energy into another d The origin of all cells can be traced to previous or pre existing cells
Answer:
D
Explanation:
The correct answer would be that the origin of all cells can be traced to previous or pre-existing cells.
According to the cell theory which is made up of three parts;
The cell represents the basic unit of all life.All living organisms are made up of cells.Cells do not arise spontaneously, but only from pre-existing cells.Hence, the discovery that the origin of all cells is traceable to previously existing cells supports the latter part of the cell theory.
The correct option is, therefore, D.
HELP ASAP PLS IF U ANSWER U GET 40 POINTS THANKS
Explanation:
The grass help feeds the baboon. This means the baboon will have to poop out the grass. Then the dung bettle feeds off of that poop.
The codon GAG becomes GTG due to a point mutation in the DNA, affecting the structure of the protein hemoglobin. What effect does this mutation have on the individual? WILL GIVE BRAINLIEST
The individual suffers from sickle cell anemia.
The individual suffers from myotonic dystrophy.
The individual suffers from Fragile X syndrome.
The individual suffers no negative effects.
Answer:
The individual suffers from sickle cell anemia.
Explanation:
Deformed red blood cells occur in 1 in 500 African Americans. This is caused due to a gene mutation called point mutation that alters the structure of the red blood cell. This alteration affects the cell's ability to carry oxygen.
Check the items you included.
Bacteria perform nitrogen fixation
More bacteria perform nitrification,
Nitrogen, in usable form, is taken up by plants,
and assimilated into their proteins (becoming
part of the plant).
An animal eats the plant and the nitrogen
becomes part of the animal's proteins.
An animal dies and decomposes, or excretes
waste, returning the nitrogen to the soil.
Answer:
SI
Explanation:
How can you determine the number of bonds an atom can make
Answer:
The number of bonds for a neutral atom is equal to the number of electrons in the full valence shell (2 or 8 electrons) minus the number of valence electrons. This method works because each covalent bond that an atom forms adds another electron to an atoms valence shell without changing its charge.
What are the four types of adaptations?
behavioral
physiological
structural
Explanation:
sorry I only know three
Answer: There are three types of adaptations: Behavioral, Physiological, and Structural.
please answer please, If we have a male hemophiliac (such as Leopold) marry a normal female, is there any way to have sons who have hemophilia? Provide a justification for your response.
If you have done odesseyware please help
Air that comes in from the ocean during the day is usually _____.
1. cooler than the on land
2. warmer than the air on land
3. the same temperature as the air on land
4. drier than the air on land
answer iits warmer
Explanation:
2
bc the water absorbs the heat from the sun
please help me. i will give brainliest
Answer:
star 2 does
the rest are either missing the grouped spectrum after 6k or the dark solid spectrum at 4500ish
Explanation:
Explain how form and function are related in human cells. Include examples.
HELP ME FAST SMART PEOPLE PLEASE HEHE LOL:)
Answer:B
Explanation:
Asorbs the heat
True or False
Prokaryotic cells generally have a higher surface area to volume ratio than eukaryotic cells.
Answer:
true I think I just guessed
TRUE : Prokaryotic cells generally have a higher surface area to volume ratio than eukaryotic cells
Eukaryotic cells are larger and complex when compared to prokaryotic cells which makes its surface area to volume ratio to be smaller than that of prokaryotic cells. cells are classified based on the arrangement of their cell structures.
Prokaryotic cells are found in smaller organisms like Bacteria while Eukaryotic cells are found in larger organisms like Humans and Plants.
Hence we can conclude that based on the complexity and size of the Eukaryotic cell, the prokaryotic cells generally have a higher surface area to volume ratio.
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