Meiosis
Explanation:
The process in maple trees that decreases the chromosome number in the pollen cells from 52 to 26 is called meiosis.
Meiosis is an important cell division process in which diploid cells are turned into their haploid number.
- In meiosis the cells divides into half and produces four daughter cells from the diploid 2n cells.
- The cell divides twice here. It is common in all sexually reproducing cells.
- It also occurs in all single celled organisms that reproduces sexually.
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Answer:
deletion of a chromosome.
Explanation:
Changes usually occur in the nuclear material (chromosomes) of a cell. These changes are called MUTATION. A mutation, depending on how it occurs, consists of different types. Mutation can result into deletion of a chromosome or addition of a chromosome.
Deletion mutation is the removal of a part of the chromosome segment or chromosome while Insertion mutation is the addition of a part of the chromosome segment to the original chromosome. Both insertion and deletion can be detrimental to the organism as it can lead to the serious genetic disorders, however, deletion of a chromosome has the most adverse effect.
During deletion mutation, information encoded in a particular chromosome is lost completely which can make the resulting individual deficient of certain traits that makes him/her normal but in Insertion mutation, a different chromosome is added which can sometimes be beneficial to the resulting organism e.g can confer resistance to certain unfavorable condition.
<span>Exercises including jumping, skipping, and calisthenics (such as those used in a warm-up) are called dynamic movement exercises.
These exercises are related to joints and we mostly perform these exercises for the activities that needs strength and speed. We see athletics doing warm up exercises before they are going to start their race or any game.</span>
The answer is the vitamin B 6 supplement can cause irreversible nerve damage. Taking too many vitamins can cause also a toxic effect on our body. Too much vitamin B6 can also cause oversensitivity to sunlight, which can lead to skin rashes and numbness, as well as nausea, vomiting, abdominal pain, loss of appetite, and abnormal liver function.
Answer:
Species a and c
Explanation:
The species c, was more closely related to species a than species b was. This is because species a and c just recently evolved into different species in evolutionary history.
