What is a subquery, and what are its basic characteristics?

1 answer:

4 0

A subquery is a query(expressed as a SELECT statement) that is located inside another query. The first SQL statement is known as the outer query, the second is known as the inner query or subquery. The inner query or subquery is normally executed first. the output of the inner query is used as the input for the outer query. A subquery is normally expressed inside parenthesis and can return zero, one or more rows and each row can have one or more columns.

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Peppered moths in the early 1800's were mostly white-winged insects. During the Industrial Revolution, these moths had a hard ti

nadezda [96]

Answer:

Evolution.

Explanation:

Evolution is the gradual change that occurs in the genetics of an organism. Change in environment of an organisms play an important role in evolution. Evolution leads to the change in the physical structure of an organisms that is compatible to that environment so gradual change occurs in the genetics of the moth having gray wings which helps the moth to hide in the ash.

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In an asexually reproducing organism it is expected that the offspring will be genetically identical to the parent. However, in

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Mutation

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I believe it is a mutation. A mutation is when the DNA is copied with a small mistake. Ex: AGCC => AGGC

Then, after a mutation, the DNA isn’t exactly identical because of this mistake in the DNA after copied.

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Answer: C. Both organisms live in the same habitat.

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Explanation:

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