Answer:
D the current changes are mush smaller than in the past.
Answer:
Immediately, the pathogen has been recognized:
Macrophages acts as the first line of defence by engulfing pathogens identified by antigens which will now present the antibody shape to a helper T cell.
The Helper T cells produce a signal to plasma and Memory B cells to yield antibodies that attach to the antigens. The cytotoxic cells that leads to cell death are activated by the helper T cells.
Antibodies helps to immobilize pathogen for macrophage to feed on.
if the pathogen comes back a 2nd time the memory cells helps in quick and efficient recovery by producing the specific B and T cells for the antigen.
decomposition of what was alive then the remains are buried by sediments which results in fossilization
A because it pertains the the ecosystem
That statement is not correct for asexual reproduction.
Asexual reproduction is when an organism produces offspring that inherit the same genes of the producer (it's essentially, a copy of itself).
It´s a type of reproduction practiced by Achaea and bacteria which are single-celled organisms.
