The best answer is A. The purpose of the cell wall is to hold the cell in a specific shape, usually rectangular or square. For example, a plant cell's wall keeps it rigid so that the plant can stand up.
If the cell does not have a wall, it can easily change shape to accommodate for things coming in and out of the cell.
Hope this helps!
<h2>Answer:</h2><h3>Part 1.</h3>
After one mitotic division, end result will be two cells.
<h3>Explanation:</h3>
Because mitosis is a cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth.
<h3>Part 2:</h3>
There will be 12 chromosomes in each daughter cell.
<h3>Explanation:</h3>
Because number of chromosome remain same (diploid) in mitosis.
Answer:
A. Molecular changes such as extracellular signals on extracellular ligands can result in quick changes in cell behaviour. One example is insulin. Upon insulin binding on the receptor on the cell membrane, the cell release GLUT4 transporters (for muscle cells) to increase uptake of glucose.
B. Slow changes in cell behaviour can be observed for other lipophilic hormones or intracellular receptors such as glucocoortoid or estrogen which reacts with receptors in the cells.
C. Insulin is required to maintain a constant blood glucose level and hence levels of insulin has to be mediated in correspondence to the blood glucose levels. Fast acting signalling is thus required for homeostasis of blood glucose levels. Where for such lipophilic hormones such as steriods, glucocortoid, these hormones tend to have a longer lasting effect and hence results in a slow change.
Abiotic factors determine which organisms can survive in an ecosystem because they are the non living objects in an ecosystem
Answer:
Matution include changes as small as the substitution of a single DNA building block, nucleotide base, with another nucleotide base.... Other matutions result in abnormal protein product.
