DNA replication is used when body needs to

Answers

Answer 1

Answer: makes a copy of itself during cell division.

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When a recessive trait is on the X chromosome: Answer males will never express it females will always express it males can express it more often than females will it will only be expressed in 1/4 of the offspring *males can express it more often than females will

Answers

The answer is females will always express it. Since, the females have only X chromosomes,they would always express this trait. Males have both x and Y chromosomes. this means that the males could still express if but, it wouldn't be as often as the females.

Which chamber of the heart exits into the pulmonary trunk?

Answers

Answer: the right ventricle

Explanation:

The pulmonary trunk originates from the right ventricle through which deoxygenated blood is pumped into the lungs.

The pulmonary trunk divides into right and left pulmonary artery which carries blood to their respective lungs.

Blood flow into the pulmonary trunk is regulated by the semilunar valve.

Final answer:

The right ventricle of the heart exits into the pulmonary trunk. This process is part of our body's pulmonary circulation, responsible for oxygenating blood.

Explanation:

The chamber of the heart that exits into the pulmonary trunk is the right ventricle. In the human heart, blood flows from the right atrium into the right ventricle after which it's pumped out of the heart into the pulmonary trunk. This blood then splits between the two pulmonary arteries that carry it to the lungs where it gets oxygenated. This process is part of the pulmonary circulation which is responsible for oxygenating blood. It's crucial for maintaining the body's overall oxygen levels and blood supply.

Learn more about Pulmonary Trunk here:

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Why do all normal cells in human body have same number of chromosomes?

Answers

The reason as to why all human body cells have the same number of chromosomes is because of the process of mitosis and meiosis.

Mitosis is the process of cell division in which body cells or somatic cells divide to yield two daughter cells with the same number of chromosomes as the parent cells. The process involves a series of steps, and results in the formation of two new nuclei each having the same number of chromosomes as the parent nucleus. The process ensures that have the same number of chromosome. In meiosis, sex cells have half the amount of chromosomes that a normal cells has and therefore when they join another, there are 46 chromosomes in the cell.

Females have two X chromosomes in their cells, while males have one X and one Y chromosome. Mitosis; before it divides it replicates & meiosis; sex cells have half the amount of chromosomes that a normal cell has so when they join another, there are 46 chromosomes in the cell.

Which promotes the idea of sustainable resources among a population?A. Promoting the use of other land for growing more food
B. Encouraging a decrease in overconsumption
C. Building a much stronger economy
D. Using technologies that can harvest resources faster

Answers

Answer: B. Encouraging a decrease in overconsumption.

Explanation:

Sustainability can be define as the judicious use of the resources. This suggests that the use of the resources should be in a way so that they can meet the needs of the present as well as the future human population.

Among the options given, B. Encouraging a decrease in overconsumption. is the correct option. This is because of the fact that if the resources are overconsumed this will lead to the scarcity of the resources. This will not help in maintaining the sustainability of resources in the population.

B, Encouraging a decrease in overconsumption

Convection in the upper mantleMagma injection at the spreading boundaries

Gravity pulling the plates downward at subduction zones

These are three theorized causes of?

Answers

movement of the tectonic plates.

I just took this test. it is : movement of the tectonic plates.

Define these terms: thermocline, halocline, pycnocline

Answers

thermocline - a steep temperature gradient in a body of water, that is marked by a layer above and below at which the water is at different temperatures.

halocline - a subtype of chemocline caused by a strong, vertical salinity gradient within a body of water.

pycnocline - a layer in an ocean or other body of water in which water density increases rapidly with depth.

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