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aliina [53]
2 years ago
5

All cells come from pre existing cells. How do we know this?

Biology
2 answers:
Gnesinka [82]2 years ago
6 0

Answer:

We know that all cells come from pre-existing cells because of cell division.

Alex2 years ago
4 0

Hi, I hope this answer will be helpful to you, please let me know if it is incorrect. :)

All living cells arise from pre-existing cells by division. The cell is the fundamental unit of structure and function in all living organisms. The activity of an organism depends on the total activity of independent cells. Energy flow (metabolism and biochemistry) occurs within cells.

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Which of the following factors might cause checkpoint genes to interrupt cell division? Check all that apply. Neurological signa
Strike441 [17]

Answer:

Neurological signals sent from fear responses in an organism tell the cell to stop. The cell's DNA has been damaged somehow. The cell's DNA was replicated incorrectly.

Explanation:

All the three options given can cause checkpoint genes to interrupt cell division.

Checkpoint genes are transcription genes that control cell cycle and sense defects during cells processes like DNA replication, segregation e.t.c and create response till the defects is repaired in the DNA. The important of checkpoint is that it ensure enough nutrients are available to support for division, ensure that the DNA has not been damaged, ensure that cells DNA is copied correctly and make sure cells have enough RNA for their protein synthesis.

Checkpoints genes can interrupt cell division if the dna is damaged, Dna is copied incorrectly and neurological signal sent from fear responses in an organisms tell the cells to stop.

5 0
4 years ago
9) Genetic variation is the source for evolution. Without a variety of phenotypes, there would be no differential survival upon
Firlakuza [10]

The genetic variation occurs due to induced changes to the genome from environmental factors, fertilization of two haploid gametes during gamete fusion. The correct options are D and E.

<h3>What is genetic variation?</h3>

The presence of differences in gene sequences between individual organisms of a species is referred to as genetic variation. It allows for natural selection, which is one of the primary forces driving life's evolution.

The genetic variation occurs due to induced changes to the genome from environmental factors, fertilization of two haploid gametes during gamete fusion.

Thus, the correct options are D and E.

For more details regarding genetic variation, visit:

brainly.com/question/848479

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3 0
2 years ago
Read 2 more answers
In order to prevent pest infestations it is important to.
svlad2 [7]

Answer: Take out the trash regularly, make sure food is stored in secure containers, clean the house regularly, and don't leave perishable foods out for a long time.

8 0
2 years ago
Which element would most likely have an electron affinity measuring closest to zero?
Keith_Richards [23]

Ar(Argon) have an electron affinity measuring closest to zero .

4 0
3 years ago
What was robert hooks contributoon to boology
faust18 [17]

Answer:

Explanation:

He contributed to the discovery of cells while looking at a thin slice of cork. He then thought that cells only exist in plants and fungi. In 1665, he published Micrographia.

3 0
3 years ago
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