The statement which provides evidence about the decreased rate of cell division is B)Decreased affinity of growth factor receptors for their respective ligands. So, correct option is B.
In each of the 4 tissues, there was a critical decline in cell division rates with age. Conversely, cell division rates didn't diminish in that frame of mind of matured mice, and just little abatements were seen in their small digestive tract or throat. These outcomes have significant ramifications for grasping the connection between ordinary undeveloped cells, maturing, and disease. Besides, they give a conceivable clarification to the baffling age-subordinate deceleration in disease frequency in exceptionally old people however not in mice.
Another assessment of recently distributed information recommended to us that the amassing of changes could slow, as opposed to increment, as people age. To make sense of this surprising finding, we estimated that ordinary undifferentiated cell division rates could diminish as we age. To test this speculation, we assessed cell division rates in the epithelium of human colonic, duodenal, esophageal, and back ethmoid sinonasal tissues.
Hence, correct option is B.
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(Complete question) is:
Research on aging suggests that as cells age, their rate of cell division decreases until they ultimately no longer divide. Which of the following would provide evidence that the decreased rate of cell division is a cellular response related to cell signaling?
A. Decreased numbers of cytoplasmic ribosomes
B. Decreased affinity of growth factor receptors for their respective ligands
C. Decreased hormone production in aged cells
D. Decreased ATP production in aged cells
Which of the following describes a scientific law?
A. People have the right to a speedy trial.
B. Any two objects in the universe attract each other with a force called gravity.
C. The universe may have begun from an explosion (or big bang) from a single point.
D. Students must wear their safety goggles in the lab.
Answer:
B. Any two objects in the universe attract each other with a force called gravity.
Explanation:
Science can be defined as a branch of intellectual and practical study which systematically observe a body of fact in relation to the structure and behavior of non-living and living organisms (animals, plants and humans) in the natural world through experiments.
Hence, the statement which best describes a scientific law is, any two objects in the universe attract each other with a force called gravity.
Gravity is considered to be a universal force of attraction which acts between all objects that has both mass, energy and occupy space. Therefore, it acts in such a way as to bring objects together.
Additionally, the gravity of earth makes it possible for all physical objects to possess weight.
What cell parts are common to all of these cells?
Use complete sentences.
Chlamydomonas
Spirogyra
Elodea
Squamous Epithelium
Answer: All cells share four common components: (1) a plasma membrane, an outer covering that separates the cell's interior from its surrounding environment; (2) cytoplasm, consisting of a jelly-like region within the cell in which other cellular components are found; (3) DNA, the genetic material of the cell; and (4). The cells of most Chlamydomonas species are more or less oval and feature a noncellulosic membrane (theca), a stigma (eyespot), and a usually cup-shaped chloroplast. Although photosynthesis occurs, nutrients also may be absorbed through the cell surface. Asexual reproduction is by zoospores. The filamentous masses come to the surface and become visible as slimy green mats. Spirogyra has a cell wall, nucleus, pyrenoid and spiral chloroplasts. This Elodea leaf cell exemplifies a typical plant cell. It has a nucleus, and a stiff cell wall which gives the cell its box-like shape. The numerous green chloroplasts allow the cell to make its own food (by photosynthesis). The central vacuole takes up most of the volume of the cell. Squamous cells tend to have horizontally flattened, nearly oval-shaped nuclei because of the thin, flattened form of the cell. Squamous epithelium is found lining surfaces such as skin or alveoli in the lung, enabling simple passive diffusion as also found in the alveolar epithelium in the lungs. brainliest?
Explanation:
Why do vestigial structures support evolution?
Answer:
Vestigial structures
Explanation:
support evolution, by suggesting us that the organism changed from using structure to not using structure or using it for another purpose.
A desert has a lower species richness than a tropical rainforest.
O True
O False
Answer:
True
Explanation:
What is not a cause of wind?
Answer:
can u explain it more I might know the answer
There are more than 300,000 species of plants that have been identified thus far in the world today; many new species are being discovered each year. In addition to providing most of the oxygen for land animals, plants do many other things for us. you will research the Internet and use reliable and credible scientific websites to investigate a specific plant species and choose a way (other than providing oxygen) that plants are useful to humans. [NOTE: Hot topic plants like Marijuana and Opium are off limits and cannot be discussed.]
Writing a full paragraph (a 150-words minimum) for your initial blog post discussing a specific species of plant and the benefit you chose. Be sure to describe what type of plant it is. Where is it found? How does it impact humans or other species? What role does it play in the ecosystem, etc.?
Answer and Explanation:
We can mention the advantages of the plants of the Fabaceae family, also known as legumes, such as beans, soybeans, peanuts and peas. First, we must mention how these plants have high nutritional values providing high levels of iron and nitrogen that are essential elements for human health. However, a benefit that these planats produce and that is important on a worldwide scale is the fixation of nitrogen in the soil. All living beings need nitrogen in their bodies, since nitrogen is a primary element in the composition of nucleic acids and proteins. Animals are able to ingest nitrogen from the vegetable diet, but vegetables cannot absorb nitrogen from the atmosphere or nitrogen from the soil, because they are not in molecular forms that plants can absorb. To reverse this, farmers put chemical fertilizers on the plantations, but these fertilizers pollute the environment intensely. It is in this scenario that the plants of the Fabaceae family are important. This is because these plants are able to associate with bacteria that can capture atmospheric nitrogen and place it in the soil, in the molecular form that all plants can absorb. This allows plants to have the necessary nutrients for their growth, reduces environmental pollution, decreases spending on agricultural production, promotes correct levels of nitrogen for human consumption and allows agricultural products to be healthier.
Napollion Crossing The Alps
Answer:
Napoleon Crossing the Alps (also known as Napoleon at the Saint-Bernard Pass or Bonaparte Crossing the Alps; listed as Le Premier Consul franchissant les Alpes au col du Grand Saint-Bernard) is a series of five oil on canvas equestrian portraits of Napoleon Bonaparte painted by the French artist Jacques-Louis David ...
Explanation:
please give me brainlist and follow
What is the Definition of Smog?
Answer:
Smog is air pollution that reduces visibility and can cause harm to people with breathing problems.
Explanation:
What type of plate boundary iS shown in the diagram?
O A. Subduction boundary
O B. Convergent boundary
• C. Divergent boundary
O D. Transform boundary
Answer:
I believe it is C. Divergent boundary
Answer:
C
Explanation:
which of the following is not a threat to biodiversity?
1. pollution and contamination
2. over hunting and over fishing
3. conservation and preservation
4. habitat loss and destruction
Which characteristic is representative of an advanced animal?
A body symmetry that is asymmetrical
B body symmetry that is radial
C body symmetry that is bilateral
D one germ layer
Answer:
your answer would be c
Explanation:
any advanced animals will be bilateral, for example: all insects and mammals ad birds are bilateral, so even if the organism was any of the three, it would be bilateral
Which component of biodiversity takes into account the number of different habitats and niches present in an ecosystem?
Select one:
A. Genetic
B. Stabilizing
C. Ecosystem
D. Species
Answer:
D is the answer hope it helps
Which is one way that DNA replication is similar in eukaryotic cells and prokaryotic cells?
a number of replication forks
b use of the enzyme DNA polymerase
c occurs in the cell nucleus
d occurs in the cytoplasm
What is the primary source of energy for all food chains?
Answer:
sunn
Explanation:
this is my alt acc
I need help with this thank you
Answer:
A).
Explanation:
Universe > Galaxy > Solar Sytem > Earth
answer the question below
Answer:
the answer I would say would be C
how many total autosomes do human cells have
Answer:
22
Explanation:
....hope it helps.......
Answer:
Humans have 22 pairs of autosomes ..
Explanation:
Choose the best answer for the following question:
What kind of information can be gained about an organism from its scientific name?
a
what genus it is
b
what species it is
c
where it lives
d
what genus and species it is
C cytosine need help with this problem
cytosine
Answer:
Explanation:
How does parental investment help reproductive success
Answer:
Explanation: investment in offspring by the parent that increases the offspring's chances of surviving and hence reproductive success at the expense of the parent's ability to invest in other offspring.
2. Name one positive benefit of having vertebrae for Chordates
An acid-fast staining method was performed on a bacterial smear using the dyes carbol fuchsin and methylene blue. The resulting stained slide contained only cells that appeared blue when visualized using a microscope. Which of the following could explain why only blue cells were present?
a. No acid-fast bacteria are present on the slide
b. Methylene blue was not used
c. Carbolfuchsin was not used
d. Acid-alcohol was not used
Answer: Only blue cells where present because No acid-fast bacteria are present on the slide. The correct option is A.
Explanation:
Acid fast staining method also called Ziehl-Neelsen (Zn) technique is used in the laboratory to stain samples suspected to contain Mycobacterium species. The Mycobacterium species which includes the M. tuberculosis, M. ulcerans, and M. leprae, do not stain well by the Gram technique, which is a common routine stain in the laboratory. This is because of waxy coating on its cell surface primarily due to the presence of mycolic acid.
The acid fast stain consists of:
--> A primary dye which is the carbol
fuchsin
--> A decolorizer which is the acid alcohol
--> A counter stain which is the methylene blue.
In it mechanism of action on the bacterial smear, when the primary dye is applied,the whole cell will appear red. But after decolorizing with acid alcohol, only acid fast bacteria will retain the red colour of carbol
fuchsin while the red dye from the background cells are removed. Then the counterstain (methylene blue) is applied which is picked up by non-acid-fast bacteria making the cells appear blue under the microscope.
Therefore when the bacteria smear is viewed under the microscope and only blue cells are seen, it means No acid-fast bacteria are present on the slide.
help, please........
Answer:
i dont know sorry
Explanation:
if the polar bear requires 5,600,000 kcal of energy each year how much energy do the seals that it eats require each year HELP ME PLEASE it is science.
Answer:
is it multiple choice?
Explanation:
What is natural selection
In a paragraph
This is for 8 grade but can someone help me
Answer:
Natural selection is a pressure that causes groups of organisms to change over time. Animals inherit their genetics from their parents or ancestors, and the environment is constantly changing.
Explanation:
(self-explanatory)
Which structure is represents a ribosome
Answer: I'm not sure what the question is, given there aren't any images provided to choose from, but a ribosome looks something like the picture I attached. Good luck!
Explanation:
4.5.1 Practice: Evolution and Classification
Answer:
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Explanation:
Answer:
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Delte spaces
Food is useful to organisms because it contains ? Radiant energy, thermal energy, motion energy, chemical energy
Answer:
I think it's chemical energy.
7 reasons plants are important to the environment
Answer: The House of the Scorpion
Explanation: the first sentence fight for this
Which three statements describe events in the formation of an ecosystem in
a new pond?
O A. Algae and plants grow in the water, and small organisms eat
them.
B. Soil fills in the pond, and it no longer holds standing water.
C. Runoff carries water and organisms into a low place on land.
D D. Sunlight reaches the bottom of the pond.
Answer:
A C and D
Explanation:
its a new pond its not filled with soil.
Answer:
its A,C, and D
Explanation:
i just took the test and got it right