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Sophie [7]
3 years ago
13

Explain why sexually reproducing organisms need to have two different types of cell division. What are the advantages of mitosis

and of meiosis?
Biology
2 answers:
Leona [35]3 years ago
5 0
<span>Mitosis and meiosis are both types of cell division, BUT

Mitosis is when a cell divides to produce two identical cells.
This is for renewing cells and repairing wounds etc.

Meiosis devices a parent cell into two haploid cells (half the chromosomes) these haploid cells (sperm in males eggs in females) combine to form a diploid gamete (first cell of a baby) so meiosis is the sex cells.



[</span><span>Meiosis is important because it reduces the number of chromosomes by half allowing sexual reproduction to occur. If meiosis did not happen, the cell would have too many DNA pairs. This would result in the death of the cell or other life-threatening complications with offspring]</span>
VashaNatasha [74]3 years ago
4 0
<span>Mitosis creates identical copies of the original cells. </span>
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The lymphoid tissues of the intestinal tract are collectively referred to as
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<span>The lymphoid tissues of the intestinal tract are collectively referred to as GALT.Gut-associated lymphoid tissue (GALT) is a component of the mucosa-associated lymphoid tissue (MALT) which works in the immune system to protect the body from invasion in the gut.</span>
6 0
3 years ago
How many double-helical DNA molecules will be present in the sperm and egg cells of dogs that are diploid animals that contain 7
ElenaW [278]

Answer:

39 double helical DNA molecules.

Explanation:

  • Meiosis always produces haploid cells.
  • Sperm and Eggs are produced after meiosis.
  • So, sperm and egg cells of dog would have 39 chromosomes and one double helix DNA molecule is present in each chromosome comprising 39 double helical DNA molecules.

<em>A chromosome has one DNA molecule before replication and have two DNA molecules after DNA replication.</em>

<em />

5 0
3 years ago
As a species evolve, they develop ________ and ________ others
Leno4ka [110]
Your answer would be: New traits, lose. This is because evolution is when a species changed and adapts to changes in their environment. During this process, they may lose old traits that are no longer useful.
8 0
3 years ago
Read 2 more answers
URGENT!! PLEASE HELP!!!
nadya68 [22]
In complementary base pairing, the G pairs with C, and A pairs with T. Given that this be the rule, the complementary nucleotides for your sequence would be as follows: CGATTAACGTAGGCA.

With regards to proofreading, mutations in cell division occur once in around every 100,000 base pairs. If this happens, the enzyme that pairs the nucleotides to form DNA, called DNA polymerase, detects the error and moves back along the strand, it then cuts the incorrect nucleotide and replaces it with the correct one, fixing the error and continuing with the DNA synthesis.
This process corrects the majority of errors in DNA synthesis, but some errors can still be missed by the DNA polymerase, this is then rectified by a protein complex which binds to the incorrect pairing until anther complex, comes along and cuts that particular section of DNA out, which is then replaced by a new section of correct nucleotides synthesized by the polymerase enzyme, the two sections at either end that were cut is then sealed by ligase, an enzyme which essentially "glues" the DNA stands back together.

My apologies for the long answer, I hope I answered your question and that you understand it well enough.
3 0
3 years ago
Read 2 more answers
Describe three examples of materials that have resulted from a lack of decomposer activity
erastova [34]

The decomposers are of two kinds, aerobic decomposers and anaerobic decomposers. The aerobic decomposers need the oxygen from the air to break down the dead and decaying matter into simple salts, sugars and hydrocarbon gases. The anaerobic decomposers do not require oxygen for the break down of dead and decaying matter. They break down the matter into various forms of hydrocarbons, sulphides and nitrogenous compounds.

When a dead and decaying matter gets buried deep within the Earth where there is an absence of the decomposers, it takes the form of crude oil, coal, peat, asphalt, and natural gas. The matter gets compressed by the weight of the rocks above and changes its form.

6 0
3 years ago
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