The correct answer is option B, that is, reduction in the number of chromosomes per cell.
Meiosis refers to a unique kind of cell differentiation, which minimizes the number of chromosomes by half, forming four haploid cells, each genetically different from the parent cell from which they originated.
This procedure takes place in all the sexually reproducing single-celled and multicellular eukaryotes, including fungi, animals, and plants. In meiosis, the replication of DNA is succeeded by two rounds of cell differentiation to generate four daughter cells, each with half the number of chromosomes as the main parent cell.
Answer:
brainliest plzzzzz
Explanation:
There is a proper mechanism of controlling the levels of various kinds of hormones and chemicals in our body called as positive feedback and negative feedback.
In a very simple language you can understand it as whenever there is a release of a particular hormone or chemical inside the body in very huge amount then the negative feedback of the body is activated the production of that particular hormone or chemical is stopped and vice -versa for negative feedback.
Explanation:positive feedback and negative both the feedback mechanism are achieved to maintain the proper homeostasis.
Example: release of clotting factor after blood loss is a positive feedback and a hormone is released and then suddenly there is a increase in hormone b, then the amount of hormone a will decrease this is a negative feedback.
The correct answer is option C, that is, woody, reinforced cell walls.
The prime layer of growth in the roots and stems of various plants, mainly in dicots like oak trees and buttercups, and gymnosperms like pine trees is known as vascular cambium. It generates phloem on the outside and xylem on the inside.
The vascular cambium thickens stems or branches and increases their girth. Thus, due to their unique tendency, one would expect vascular cambium to be simple, undifferentiated cells, which possesses the tendency of rapid cell differentiation, but would not expect them to have woody, re-inforced cell walls.
Answer:
Involve changes in one or few nucleotides/ bases
Explanation:
Point mutations most commonly involve the substitution of one base for another (which changes the complementary base as well in DNA). The term point mutationt also includes insertions or deletions of a single base pair.
