How do the actions of earthworms

Which statement about the cell membrane is true?

Softa [21]

The statement about the cell membrane is true is "It is present in animal cells only", the answer is letter B. Cell membrane does not involve in communication, it only protects the organelles in the cell. It is not rigid since it does not exist in the plant.

3 0

3 years ago

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Many different types of mutations can occur within the body. Sickle cell anemia is a disease that occurs when a mutation in a ba

kolbaska11 [484]

Answer:

Missense

Explanation:

The key in this question is 'which type of mutation causes this problem.

The description of this disease gives the the answer. A replacement of a glutamic acid amino acid with and Valine amino acid is called missense.

Silent mutation do not cause any difference in structure or function of the protein.

Insertions are an additional nucleotide or 2 added to the sequence

Frameshifts are the same as insertions, but the insertion occurs in part of the gene that codes for the protein. Because of that 'insertion' the reading frame of this gene is out and the protein sequence is not correct.

6 0

3 years ago

How is cytokinesis different in animals and plants? Animal cells get pinched into two daughter cells by the cell membrane; the p

jasenka [17]

<h2>Let's review what cytokinesis is first.</h2>

Cytokensis is the physical process of cell division. It divides the cytoplasm of a parental cell into two different daughter cells.

In plants, a cell wall forms. Cytokensis occurs in mitosis and meiosis. The objective for cytokensis is to divide the parent cell into two daughter cells. So cytokensis in plants is when a cell wall forms in between the daughter cells. Plant cells have walls, so they CANNOT divide using a cleavage furrow. A cell plate forms across the cell during telophase.

In animal cells, cleavage furrow forms. This pinches the cell in half and forms two different cells.

A cleavage furrow is an indentation that appears in the cells surface when the cell is preparing to divide.

So, let's review our options:

A: Animal cells get pinched into two daughter cells by the cell membrane; the plant cell has to form a cell plate before it can create daughter cells.

This would be the correct answer. The only main difference between animal cell cytokensis vs plant cell cytokensis is the cell wall that animal cells lack. Animal cells get pinched into two daughter cells, by the cleavage furrow in the cell membrane, while the plant cell has to form a cell plate before it can create daughter cells.

B: Animal cells give daughter cells a full set of chromosomes at the time of division; plant cells give daughter cells a half set of chromosomes. .

This can be disproven. In meosis, a cell divides into four cells that have half the number of chromosomes. In mitosis, all chromosomes are kept. Both Plant & Animal cells both reproduce using both both meosis and mitosis, so this option is irrelevant.

C: Animal cells require an extra grow phase before cytokensis; plant cells move straight to cytokensis.

Both animal cells and plant cells have the same amount of "grow phases" before cytokensis. This option is irrelevant.

D: Animal cells begin cytokensis during anaphase, plant cells begin around the same time as telophase.

They both begin during the same time. This option is also irrelevant.

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3 years ago

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Kane how is co-evolution of symbiotic prokaryotes with eukaryotes similar and different to co-evolution in parasite-host systems

Romashka [77]

How co-evolution of symbiotic prokaryotes with eukaryotes similar and different to co-evolution in parasite-host systems is that co existing has provided a sense of advantage with in the environment. One example of this are the parasites. There are different kinds of symbiotic relationships and this shows how similar and different co-evolution is. Hope this helps.

4 0

3 years ago

The two navy officers shown at left are identical twins. Why do you think identical twins look so similar?

azamat

Answer:

The two navy officers shown at left are identical twins. ... Identical twins look so similar because identical twins have the same genetic makeup, meaning, the same DNA (same nitrogenous bases). This is because by they are fertilised by the same egg, making them identical.

Explanation:

This is copied so be careful

Hope it helped!

6 0

2 years ago