Answer:
Darwin's theory of biological evolution tells us that all life on earth may have originated from a single, relatively simple reproducing creature living in the distant past. This idea is based on many observations, one of which is that when living things reproduce, children are often born with random new traits.
Explanation:
Hi, you've asked an Incomplete question. However, I provided a brief about cell theory.
<u>Explanation:</u>
The cell theory basically states that all living things are made of cells and that the cell is <u>the basic unit of life.</u> Robert Hooke, who was a Scientist is known to have originated (coined) the term “cell” in the year 1665.
Basic Facts about Cell theory:
- the basic unit of life is the cell
- all living things have one or more cells.
- already existing cells produce all new cells.
Answer:
d) A negative feedback loop
Explanation:
A negative feedback loop counteracts the deviation from homeostasis by generating a required response. The function of the insulin hormone is to lower down the blood glucose level when it raises above the normal range. Insulin triggers the uptake of glucose from the blood by cells. It specifically triggers muscle and liver cells to take up glucose from the blood.
Once the blood glucose level is restored to the normal value, the secretion of insulin stops. Here, a change in normal body condition (raised blood glucose level) was counteracted by the secretion of insulin hormone to restore the homeostasis of blood sugar levels.
Answer:
A compound contains atoms of different elements chemically combined together in a fixed ratio. An element is a pure chemical substance made of same type of atom. ... Compounds contain different elements in a fixed ratio arranged in a defined manner through chemical bonds.
Explanation:
