Answer:
Explanation:
Meiosis is a form of cell division that occurs in the sex cells of organisms. It ensures the reduction of a diploid cell to an haploid cell to allow for the formation of a diploid zygote after fertilization (contribution of both parents haploid sex cells to give a diploid zygote). Thus, this process is very essential and important.
The reduction is accomplished by 2 divisions after the duplication of chromosomes
- first division: separation of homologous pairs of chromosomes (this reduces the total in half)
- second division: separation of sister chromatids of a chromosome.
The rearrangement in meiosis occurs by crossing over/genetic recombination.
This is the exchange of genetic material between homologous pairs of chromosome bringing about a rearrangement and genetic variation
An example of a chromosomal abnormality that arises as a result of defects in this process is the Down Syndrome which is caused by a nondisjunction of the chromosomes 21 pair in a sex cell.
This condition produces offsprings that have some characteristic facial features, short stature etc
Answer:
In RNA cytosine binds to Guanine
Explanation:
I hope this will help you :)
The best answer is C.
Plant cells are surrounded by a cell wall and have chloroplasts whereas animal cell do not.
The cell wall is a covering that is rigid whose main purpose is to protect the cell and give structural support as well shape to the plant cell. The equivalent of a cell wall in animal cell is the cell membrane, which has distinct differences from the plant cell wall.
Chloroplasts are plant cell organelles which carry out photosynthesis by which plants make their own food. These are absent from animal cells because animals do not make their own food, they ingest it from external sources.
I found the exercise on the internet and these are the options:
"<span>a. gluconeogenesis begins
b. beta-oxidation increases
c. blood glucose levels fall
d. the liver produces more glycogen"
The option that's not likely to happen is "</span>the liver produces more glycogen".
The formation of glycogen by the liver happens after eating a meal with carbohydrates. The level of blood glucose increases, and insulin is secreted by the pancreas and will act by allowing glucose to enter the body cells. When the glucose enters the liver cells, insulin will also act on the liver by stimulating glycogen synthesis. This process continues to happen until glucose levels begin to decrease in the <span>post-absorptive state</span> and, therefore, insulin secretion also decreases leading glycogen synthesis in the liver to stop.
