Crossing over, or recombination, is the exchange of chromosome segments between nonsister chromatids in meiosis. Crossing over creates new combinations of genes in the gametes that are not found in either parent, contributing to genetic diversity.
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Answer:
Hydrogen atom of one molecule and carbon atom SPF another molecule
The statements above are true;
In a host-versus-graft rejection the recipient's immune system recognizes the donor's tissue as foreign and rejects the transplant. On the other hand, in a graft-versus-host rejection, the donor tissue recognizes the recipient's tissue as foreign and the transplant rejects the recipient, causing destruction of the recipient's tissue and possibly death. Its important also to note that there are two types of rejection, the acute rejection, where the rejection of transplanted tissue that occurs several weeks after transplant. it is delayed hypersensitivity reaction, and the chronic rejection is a rejection of transplanted tissue that can occur at a late time. Immune complexes form in the arteries supplying the graft, choking off the blood supply and the tissue is rejected.
It is also known as 'The Great Bear'
The answer is osteoporosis
Osteoporosis is a condition when the bone(osteo) density is decreased, makes them look like having pore or spongy. It is found frequently in the elder woman that has been menopause for a few years.
Estrogen has a role in bone remodeling which causes a protective effect on woman before menopause.
