<h2>Densities </h2>
Explanation:
The force which is responsible for an object to float over a liquid is the buoyancy force and it depends on the density of the liquid and the object which means that the object’s density should be less compared to the liquid density to float over the water
In case of birds such as ducks, geese, and swans, they have greater densities than water, yet they are able to sit on its surface because they have special glands which secretes oil
The secretion of oil makes their feathers oily and hence they can shed the water on feathers and feathers in turn do not get wet
These birds can then float easily on water by their webbed feet and larger surface tension of water
Surface tension is the elastic tendency of the surface of the fluid that makes it acquire the least surface area possible
- D
- C
- A
- B
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the answer is a fish amphibians and mammals
Explanation:
I took the test
Answer:
False
Explanation:
Chief cells usually secrete pepsinogen, but the product does not related is to acidity.therefore, Whenever
HCl secreted by the parietal cells activate pepsinogen, the pepsinogen is converted into pepsin, and pepsin is an enzyme that acts on proteins.
NOTE:
The gastric chief cell is one of the cells in our stomach that brings about the release of pepsinogen and chymosin. Pepsinogen is activated into the body's digestive enzyme pepsin and the pepsin will have contact with acid that is produced by gastric parietal cells.
Pepsinogen is substance that is secreted into gastric juice from both mucous cells and chief cells. After secretion pepsinogen is activated into the active protease pepsin by the stomach acid.the protease pepsin helps the stomach's ability to initiate digestion of proteins.
The epididymis is the male part that introduces the sperm into the female.
