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kvasek [131]
3 years ago
7

Membrane proteins are among the most important proteins biologically because they allow cells to communicate with their environm

ents. In humans, they determine whether the immune system recognizes the cell as foreign or not and they are the targets of most pharmaceuticals. In all organisms, membrane proteins are responsible for other functions as well. One function determines when and if cell division takes place. That is
Biology
2 answers:
bulgar [2K]3 years ago
8 0

C) activation of growth hormones.

pogonyaev3 years ago
5 0
One function determines when and if cell division takes place. That is activation of growth hormones.
When these hormones start forming, that is when the cell is going to be divided. 
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kumpel [21]

Answer:

It's C. Plants produce oxygen and nutrients via a process known as photosynthesis using water and carbon dioxide

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What would most likely occur over time if new technologies gave us information that challenged what scientists currently underst
tresset_1 [31]
The last choice seems most correct 
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What are the segments of DNA that code for specific traits called?
Delicious77 [7]
The segments of DNA that code for specific traits are called genes
6 0
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A letter about the evidence of evolution
GuDViN [60]

Answer:

I am writing this in response to a letter regarding evolution. Evolution is increasingly solid, not shaky. Darwin’s “theory” or explanation was a way of understanding what he had discovered (which did not include genes, chromosomes, DNA or nucleotide bases). Our explanations now include genetics and the commonality of mutation.  

Proofs are solid, not in question by serious scientists. Direct observation is one, which we see in the fact that this year’s flu evolved a little too far from last year’s, so flu shots are less effective this year than we would like them to be.  

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Many other animals and even plants similarly have flaws that show their evolutionary past. Two large human chromosomes reflect the coming together of two chimpanzee chromosomes each.

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5 0
2 years ago
Proteus vulgaris has a doubling time of roughly 28 minutes. If an initial population of 500 cells is allowed to grow for 6 hours
romanna [79]

<u>Answer:</u> The final population of Proteus vulgaris after 6 hours is 3.71\times 10^{6}cells

<u>Explanation:</u>

We are given:

Proteus vulgaris divides and doubles every 28 minutes

Total time given = 6 hours = 360 min      (Conversion factor: 1 hr = 60 min)

Number of times Proteus vulgaris doubles in 6 hours = \frac{360min}{28min}=12.857times

Calculating the number of bacteria after 6 hours under ideal conditions:

We are given:

Initial population = 500 cells

Number of times it doubles = 12.857 times

Final Proteus vulgaris population = 500\times 2^{12.857}=3709476.8=3.71\times 10^{6}cells

Hence, the final population of Proteus vulgaris after 6 hours is 3.71\times 10^{6}cells

8 0
3 years ago
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