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Andrews [41]
3 years ago
5

A large amount of untreated sewage entered the river. Many fish died. Untreated sewage water contains organic matter and bacteri

a. Explain why many fish died.
Biology
1 answer:
AleksAgata [21]3 years ago
6 0
If untreated sewage gets into rivers, microorganisms decompose it. They use oxygen from the water for aerobic respiration. As a result there is less oxygen dissolved in water, so aquatic organisms such as fish and insects may be unable to survive.
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Which contains instructions for how cells come together to form a heart
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DNA contains instructions for how cells come together
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4 years ago
In plants tall (T) is dominant to short (t) and round seed is dominant to wrinkled seeds (r). If a parent is short and wrinkled
Nuetrik [128]

Answer:

Parent cross= ttrr (short, wrinkled) × TtRr (hybrid)

POSSIBLE GAMETES BY EACH PARENT:

ttrr - tr, tr, tr, and tr

TtRr - TR, Tr, tR, and tr

Explanation:

This question involves two genes in a certain plant. One gene is coding for height while the other is coding for seed shape. The alleles for tallness (T) and round seeds (R) is dominant over the alleles for shortness (t) and wrinkled seeds (r).

According to this question, a parent that is short and wrinkled (ttrr) is crossed with another parent that is hybrid (TtRr) for both traits. This means that the parent cross is as follows: ttrr × TtRr

The possible combination of gametes that will be produced by each parent is as follows:

ttrr - tr, tr, tr, and tr

TtRr - TR, Tr, tR, and tr

See attached image for the punnet square using these gametes.

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3 years ago
Which of the following is a TRUE statement?
vlada-n [284]

C) lipids contain more energy than carbohydrates because they contain more carbon to hydrogen bonds to release energy when broken

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Why are radioactive elements useful for the study of biological systems?
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Which organelle in a prokaryotic cell contains genetic information? Question 3 options: Capsule Ribosomes Flagellum Nucleoid.
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The single-cell organism that does not contain a well-defined nucleus and membrane are called prokaryotes. The genetic information is contained in the nucleoid of the cell.

<h3>What is a nucleoid?</h3>

Nucleoid is a region in the cytoplasm of the prokaryotic cell that is an irregular-shaped structure that consists of the genetic material of the cell.

The process of the replication and transcription of the DNA and RNA of the prokaryotic cell occurs here and is different from the eukaryotic nucleus by lacking a nuclear membrane.

Therefore, prokaryotic genetic material is contained in the option D. nucleoid of the cell.

Learn more about the nucleoid here:

brainly.com/question/5083911

4 0
3 years ago
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