Reproduction, growth, renewal and repair are all reasons for cell division in multicellular organisms.
Cell division is a process that allows a parent cell divides into more smaller cells. It is classified as mitosis and meiosis. Mitosis produces diploid cells that will be used for growth or repairing tissue. Meiosis will produce gamete that has a role in reproduction.
Answer:
The correct option is A
Countercurrent multiplication is the process whereby energy is used to generate an osmotic gradient in which water is reabsorbed from the tubular fluid to produced concentrated urine.
Explanation:
Countercurrent multiplication moves sodium chloride from tubular fluid into interstitial space deep within the kidneys. The concurrent multiplication process build up osmotic gradient interstitial fluid in a single effect. Here, sodium chloride is driven by active transport out of the tubular fluid in the thick ascending limb into the interstitial fluid, which becomes hyperosmotic. This result to water moving passively down its concentration gradient out of the tubular fluid in the descending limb into the interstitial space to a point where it attains a state of equilibrium.
Therefore,the correct option is A, where the ions leaves the ascending limb to make water comes out of descending limb.
Two main functions of polysaccharides in living things are:
1. structural components
2. energy storage.
Those polysaccharides that are not easily broken down are used as structural components. Some of them are cellulose in plants and chitin in insects and crustacean.
On the other hand, starch and glycogen are easily broken down, so they serve as energy storage. <span>When energy is needed immediately, they break down to glucose and great amount of energy is released, </span>
It is located <span>midway on the anterior surface of the shell.</span>
What is an introduced species ?
A. A species that is a poor predator
<u>B. A species that does not normally live in an area
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C. A species that has no permanent home
D. A species that increases biodiversity
