Why do you think mutations are necessary for species to change?

1 answer:

8 0

Mutation is the primary cause of all genetic variation. Mutation is important as the first step in evolution, as it produces a new sequence of DNA for a particular gene, producing a new allele. Recombination, through intragenic recombination, may also generate a new DNA sequence (a new allele) for a particular gene.

You might be interested in

How do plants play a role in carbon cycle?

Cerrena [4.2K]

Plants absorb carbon dioxide and water to make their own food and release oxygen

8 0

3 years ago

What would you say to people who deny global warming just because it shows in the<br> wintertime

SashulF [63]

Answer:

i would probally ask them why they dont think its real. I would honestly try to understand. And then i would show them graphs (online of course) about how its affecting the planet and if they still dont listen id probally just fight them

Explanation:

7 0

3 years ago

Read 2 more answers

Do stomata close when there is a lack of water in soil or a lack of carbon dioxide in the atmosphere?

Arte-miy333 [17]

<em>When water is abundant:</em>

-Temporal regulation of stomata is used:

Open during the day

Closed at night

- At night, there is no photosynthesis, so no demand for CO2 inside the leaf.

- Sunny day = demand for CO2 in leaf is high = stomata wide open.

- As there is plenty of water, plant trades water loss for photosynthesis products.

- If the leaf's CO2 concentration is low, the stomata will stay open to continue fueling photosynthesis.

- High temperatures will also signal stomata to close.

- When limited water is available in the soil, plants try to prevent water loss.

5 0

3 years ago

Which of these organelles is absent in a prokaryotic cell?

Olin [163]

all membrane bound organelles are absent in prokaryotic cells. They only have a membrane, cytoplasm, DNA and ribosomes(and also some sort of a cytoskeleton that helps with division and cell shape)

Hope this helps

7 0

3 years ago

During exercise, protein synthesis in muscle cells stops. After exercise, protein synthesis starts again and contributes to the

Marysya12 [62]

Answer:

D. 4E-BP1 binding to elF4E prevents loading of the mRNA onto the ribosome.

Explanation

In eukaryotic organisms, the eIF4E translation initiation factor functions by directing the ribosomes to the 5'-terminal cap structure of the messenger RNA (mRNA) in order to start the translation. Moreover, phosphorylation is a posttranslational modification of specific amino acids on proteins that play diverse cellular functions by altering protein stability, location, and/or enzymatic activity. It has been shown that elF4E phosphorylation is increased in response to cellular stimuli that induce translation in the ribosomes (e.g., growth factors, hormones, etc). The eukaryotic translation initiation factor 4E (eIF4E)-binding protein 1 (4E-BP1) is a repressor of mRNA translation which is phosphorylated and inactivated by growth factors and hormones, thereby inhibiting 4E-BP1 binding to elF4E and consequently activating translation.

5 0

2 years ago