During which stage of a cell's cycle do the replicated chromosomes thicken and become visible?

Answers

Answer 1

Answer: the cell cycle moves on the chromosomes thicken as the size of the cell grow and since became vissible!

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How do genetics (genetic predisposition) and the environment work together to cause substance abuse in individuals? What is the likely role of epigenetics in this process?

Answers

Answer: The drug abuse is influenced by the environment and exerts influence on the gene expressions.

Explanation:

The genetic make up of the person is decides, which genes will be expressed and develop a trait in an individual. But this genetic expression can be influenced by the environmental factors like food, exposure to sunlight, and others. This study which relate environment with the genetic make up is called epigenetics. No person is drug addict by birth but the consumption of drug can influence the genetic make up and traits in a abuser. So here, the environment is influencing the genetic basis of a abuser.

Mouth, pharynx, esophagus, stomach, _______

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Answer:

mouth, pharynx, esophagus, stomach, Small Intestine.

Large Intestine.

Rectum.

Accessory digestive organs: liver, gallbladder, pancreas.

What happens during interphase?

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Answer:

During interphase, the cell grows and the nuclear DNA is duplicated. Interphase is followed by the mitotic phase.

During interphase the cell grows and the nuclear DNA is duplicated. Interphase is followed by the mitotic phase, the duplicated chromosomes are segregated and distributed into daughter nuclei. The cytoplasm is usually divided as well resulting in two daughter cells

What occurs in nondisjunction and what effect does it have on the resulting cells?

Answers

Nondisjunction is the failure of a pair of chromosomes to separate (to disjoin) during cell division (meiosis). When this happens ( in anaphase I of meiosis) two out of the four new daughter cells produced from a parent cell will have an extra copy of one chromosome and the other two daughter cells will end up missing that chromosome.

Most of the time when fertilization involves gametes with an abnormal number of chromosomes, the resulting cell does not survive to produce a new individual. However there are some cases where the individuals survive and such, when they are born end up having a syndrome caused by too many or too few chromosomes. An example is Turners syndrome caused by too few chromosomes (monosomy x) , and Down syndrome caused by too many chromosomes (trisomy 21).

Answer:

Nondisjunction is the failure of a pair of chromosomes to separate during meiosis.

Explanation:

The rate of primary productivity is equal to the rate of secondary productivity.a. True
b. False

Answers

B false, every time it drops by a power of 10

B.false whenever it drops by 10

Which of the following is not an example of a caught in or caught between hazard?

Answers

Running over worker with a dump truck which is over speeding is not an example of caught between hazard and caught in.

Caught between hazard or caught in is termed as a situation whereby a person is being compressed or squeezed or crushed between some two objects.

On of the thing that is not an example of a caught in or caught between hazard is : running over a worker with a speeding dump truck

Caught in or caught between hazard is a situation in which a person was being squeezed, compressed, or crushed between two objects.

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