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KonstantinChe [14]
2 years ago
15

What factors help blood move through veins?

Biology
1 answer:
horsena [70]2 years ago
6 0

The pumping force of the ventricles moves blood through the arteries. The breathing movements exerts pressure on the chest veins, the valves in the larger veins keep the blood from flowing backwards, and the skeletal muscles' contraction all help the blood in veins to move.

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Can someone explain asexual and sexual production ?
oee [108]

Answer:

Asexual is reproduction with one parent (single celled organisms)

Sexual is reproduction with two parents

Explanation:

<h2><u>Asexual reproduction</u> </h2>

is a type of reproduction by which offspring arise from a single organism, and inherit the genes of that parent only; it does not involve the fusion of gametes and almost never changes the number of chromosomes. Asexual reproduction is the primary form of reproduction for single-celled organisms such as the archaebacteria, eubacteria, and protists.

<h2><u>Sexual Reproduction</u></h2>

Sexual reproduction is a form of reproduction where two morphologically distinct types of specialized reproductive cells called gametes fuse together, involving a female's large ovum (or egg) and a male's smaller sperm. Each gamete contains half the number of chromosomes of normal cells.

8 0
3 years ago
Read 2 more answers
Which of the following cannot metabolize nutrients? *
allsm [11]

Answer: The answer would be viruses

Explanation:

A virus is a bad bacteria, it breaks your cells down instead of building them up. Fungi and bacteria are naturally in your body because they help your metabolism and breaking down nutrients. Animals are able to do this too with their own bactieria. But as I said, viruses dont help you, they only harm you.

5 0
3 years ago
What causes there to be a H+ ion concentration gradient to build up inside the thylakoid space? Check all that apply. a. The ele
siniylev [52]

Answer:

a. The electrons provide energy for the H+ pump to transport more H+ ions into the thylakoid space.

d. The photolysis of water releases H+ ions into the thylakoid space.

Explanation:

This question describes the first stage of photosynthesis, which is LIGHT-DEPENDENT REACTION. The light dependent reactions involve creating ATP (energy carrier) and NADPH (electron carrier) needed for the Calvin cycle (light independent stage) to occur.

The ATP is formed by pumping hydrogen ions (H+) into the thylakoid space/lumen, hence, creating a electrochemical gradient needed for ATP synthase to synthesize ATP. The buildup of H+ ions is caused by:

- The electrons that arise when light photons hit a chlorophyll molecule is used to provide energy for the H+ pump to transport more H+ ions into the thylakoid space.

- The photolysis of water results in the production of electrons (e-) and hydrogen ions (H+). These hydrogen ions are released into the thylakoid space.

8 0
3 years ago
Which event occurs after erosion of Earth’s surface?
Arisa [49]
Deposichen will drop
4 0
4 years ago
Read 2 more answers
A young boy has been found, and police are trying to locate his family. They take a DNA sample from him and begin collecting DNA
GaryK [48]

Answer:

The correct answer would be Y-chromosome analysis.

Y-chromosome analysis is technique used to search the parental line of a boy on his father's side.

Gender of a person is determined by 23^{rd} chromosome in humans. XX is present in females and XY is present in males.

Mother always passes X chromosome to her progeny but father passes both X and Y chromosomes. If X is passed from the father then the offspring will be a girl and if Y is passed from the father then the offspring will be the son.

The sons (F₂) of this son (F₁) will also bear the same Y chromosome as that of grand father (P).

Thus, Y chromosome always passes from father to son and hence, Y-chromosome analysis can help in identification of father of this young boy.

3 0
3 years ago
Read 2 more answers
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