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hram777 [196]
3 years ago
9

Explain how valves help the transport of blood in veins.

Biology
1 answer:
pychu [463]3 years ago
4 0

Answer:

The valves' main job is to keep the blood moving in one direction – back up towards the heart. When the valve is open, blood freely flows upward towards the heart and when the valves are closed, blood cannot flow back

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Why is a parent usually a better match for transplanted tissue to a donor than a random individual of the same species?
s344n2d4d5 [400]

Answer: For decreased chances of rejection

Explanation:

The three higly polymorphic MHC 1 genes in human beings are HLA-A, HLA-B and HLA-C.

These determine the compatibility of the organ or tissue in the recipient's body each by the help of many alleles that segregates in a population.

There are very less chances that a random chosen donor will match the a recipient six allele genotype.

This is the reason parent  may be the best donor for organ transplantation or tissue transplantation.

7 0
3 years ago
If you had to pick a specific food that was high in potential energy to include in your diet, which food would you pick and
torisob [31]

Answer:

I would choose a food source that has a significant level of carbohydrates, proteins, and vitamins. <em>E.g.</em> bananas.

Explanation:

Food is one of the most important ways to increase our energy. It may be very common to feel lethargic throughout the day when one's diet is not appropriate or balanced.

According to nutriologists, bananas are one of the best foods that boost our energy. Bananas contain carbohydrates, [natural] sugar, minerals, and amino acids. Incorporating this fruit into your diet can be extremely helpful, especially if you practice sports. In fact, recent research showed that consuming bananas before and after exercising helps you maintain your body with high levels of energy throughout the day and, therefore, helps you to have a better performance.

8 0
3 years ago
Vegetarianism is often cited as a partial solution to the growing problem of deforestation and other types of habitat destructio
PilotLPTM [1.2K]

Answer:

Option B. is correct

Explanation:

Vegetarianism is the practice of abstaining from by-products of animal slaughter and the consumption of meat. Vegetarianism is often cited as a partial solution to the growing problem of deforestation and other types of habitat destruction as the human population continues to grow. The reason for this is more people can be fed using less agricultural land because vegetarians eat at a lower trophic level.

Option B. is correct

3 0
2 years ago
Which of these is the reasons organisms perform photosynthesis?
IrinaVladis [17]

Answer:

Plants perform photosynthesis to produce glucose.

Explanation:

Glucose is used by plants for energy and to make other substances like cellulose and starch.

5 0
3 years ago
Read 2 more answers
How could human activity disrupt the habitat and niche of an organism like the gray fox?
BlackZzzverrR [31]

Answer:

Disruption such as deforestation or mining can destroy the habitat, leading to water pollution, mud slides, and loss of soil. With the habitat affected, the animals the grey fox feeds on, such as rabbits or mice, will be affected as well, leading to the grey fox losing a source of food. By limiting the diet of the grey fox, other predators will be more likely to compete with the grey fox, disrupting its niche.

4 0
3 years ago
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