Which is an activity that increases the genetic variation within a population of earthworms

Answers

Answer 1

Answer: mating i would think

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Biodiversity is valuable partly because ita. gives us interesting things to look at. b. tells us about many other species.c. contributes to medicine and agriculture.d. provides humans with resistance to disease
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Why is killing its host usually disadvantageous for a parasite?

Answers

It leaves the parasite stranded in the host making it tough to survive!
But also nature can take it's natural course and solve the problem by
-- You Guessed It -- Mutation, adapting to the problem. By mutation
the parasite may be able to make itself air-borne, spreading from host
to host!

sometimes the parasite might live off of the host.

Why do erythrocytes swell and burst when placed in water? (A) Since water concentration is higher outside the cell, water moves inward by passive diffusion.
(B) Since hemoglobin concentration is higher inside the cell, hemoglobin moves outward by exocytosis.
(C) Since potassium ions are more concentrated inside the cells, potassium ions move outward by osmosis.
(D) Erythrocytes pump water inward by active transport to balance osmotic gradients.
(E) Water is a universal solvent and simply dissolves the erythrocyte membranes.

Answers

A.
There is more sodium inside the cell than outside. There is a saying that "water follows salt". It is found in the case of osmosis and the semipermeable membrane around the cell. In this case there is more salt inside so water will move inside. The cell can break with too much water.

What is semen? an exocrine gland near the opening of the urethra a structure located on the outside of the male body a combination of sperm and other reproductive fluids a production of fluid that gives the sperm nourishment.

Answers

Semen is a combination of sperm and other reproductive fluids. Semen is a complex fluid that plays an important role in male reproduction. Hence option c is correct.

What is semen?

Semen is a fluid that is ejaculated from the male reproductive system during sexual intercourse or other forms of sexual activity. It is composed of a mixture of fluids, including seminal fluid and spermatozoa (sperm cells).

The seminal fluid, which makes up the majority of semen, is produced by three glands: the seminal vesicles, the prostate gland, and the bulbourethral gland. These glands secrete fluids that provide nutrients and protection for the sperm, as well as a suitable environment for them to survive and function properly.

The seminal fluid contains various substances such as fructose, amino acids, enzymes, and prostaglandins, which help nourish and protect the sperm as they travel through the female reproductive tract.

The spermatozoa are produced in the testes and are responsible for fertilizing the female egg during sexual reproduction. The semen acts as a transport medium for the sperm, enabling them to reach the female reproductive system and potentially fertilize an egg.

Therefore, option c is correct.

To learn more about Semen:

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Answer:

Explanation:

On e2020

what is the food chain in a temperate ocean(Describe the general food interaction of plants and animals. Draw an example.) please help!!!!

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This should help. It is attached right below.

Two organisms that occupy many of the same niches are most likely(A) mutualistic partners.
(B) predator–prey.
(C) host–parasite.
(D) competitors.
(E) commensalistic partners.

Answers

D i believe, not exactly sure tho

Acid rain does which of the following?A. increases nutrients in soil
B. enhances leaf growth in plants
C. neutralizes lakes, streams, and oceans
D. damages statues, buildings, and other structures

Answers

The best answer is option D.Acid rain is simply rainfall that has been rendered acidic due to water vapor reacting with nitrogen oxide ad sulphur dioxide very high up in the atmosphere.Acid rain is not only a threat to the ecosystem and environment, but also seriously damages buildings and sculptures.Marble and limestone are especially vulnerable to acid rain. This is because the two building or construction materials contain calcite which is easily dissolved by acid.Concrete surfaces and paint finishes are also seriously damaged by acid rain.

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