It is pH. If you have a pH of 0-6 it is a acidic. If you have a pH of 7 it is neutral. If you have a pH of 8 or above it is a base.
Answer:
(a)1. the replication of genetic materials at S-phase of interphase of both mitosis and meiosis prior to cell division.( This ensured required amount of genetic material are present in the daughter cells to produce, and enough food source as raw material fro the entire division process.
2.the manner in which the the chromosomes are aligned at the center of the cell before the chromosomes separates. (This ensured that required or exact copies of chromosomes are available in the new daughter cells as the chromosomes migrates to new daughter cells at Metaphase and Anaphase.
(b)Number of cell cycles or division and crossing over
This occurs because of the number of cell divisions that occurs, Mitosis occurs in one cycle of division which multiplied the number of cells formed, and therefore refereed to as multiplication division.(2n)The new daughter cells have exact number of chromosomes as the parent cells. While meiosis occurs in two cycles of Meiosis 1 and 11. This is a reduction division(n) in which the new daughter cells have haploid or half of the parent chromosome numbers.
Crossing over is another feature which increases the chances of variation from the mixing up of genetic materials of both parents in the new daughter cells at a point called chiasmata. This makes the new haploid daughter cells having new genetic composition slightly different from both parents.
Answer:
Option C
Explanation:
Please see the attached image for the panama canal
Solution
Shrimps are the species that live in the bottommost areas of any water body i.e the bottom of the river or at the base of an ocean floor. Some of them are in habit of hiding themselves into the sand, mud, and rock along the sea shore.
In the image, the region A1 and B1 is the region closest to the ocean surface and as stated earlier some species of shrimps live close of sea/ocean surface. Thus, A1 and B1 regions will have shrimp hybrids.
Hence, option C is correct
The first cell division in meiosis, the process by which germ cells are formed. In reduction division, the chromosome number is reduced from diploid (46 chromosomes) to haploid (23 chromosomes). Also known as first meiotic division and first meiosis.
