Answer:
The characteristic of water-soluble hormones are:
1. They dissolve in water and do not dissolve in fat or oil
2. They are produced from amino acids that are soluble in water
3. They will be unable to pass through cell membranes that have fatty molecules
4. They are receptor-specific. That is they bind to a receptor that fits them on the target cell.
An isolated colony on a selective medium is not considered a pure culture because inhibited organisms might be masked by the colonies. This statement is true.
On the basis of their constitution or usage, culture media can be classified into various groups; these include defined, complex, selective, as well as enrichment medium.
A selective medium consists of dyes or noxious substances/chemicals which inhibit the growth of specific microorganisms but promote the growth of other microbes.
A pure culture is a laboratory culture which contains a single species of microorganism. It is free from other microorganisms.
Since selective media affects the growth of distinct organisms differently, therefore, an isolated colony formed in such type of medium is not considered a pure culture.
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Answer:
B Tundra.
Explanation:
Tundra winters are long, dark, and cold, with mean temperatures below 0°C for six to 10 months of the year. The temperatures are so cold that there is a layer of permanently frozen ground below the surface, called permafrost. This permafrost is a defining characteristic of the tundra biome.
Arteries
The arteries are the blood vessels
that carry repeated loads of oxygen-rich blood from the heart to all parts of
the body. Arteries are muscular and elastic tubes that operate under high
pressure exerted by the pumping action of the heart. The largest artery is the
aorta while the arteries' smaller branches are called arterioles and
capillaries.
