In general, yes, the dorsal blood vessel of a worm be seen from the worm's exterior because a worm's "skin" is very thin. Although of course there are exceptions.
The fish that were following the other fish around.
Answer:
The original phagocyte secretes cytokines that attract other phagocytes
Explanation:
Before phagocytosis occurs and with the presence of an original phagocyte at the scratch site mostly a macrophage (also a phagocyte), chemical signals signals are given off to attract phagocytes to the scratch site.
These chemical signals may be cytokines that are given off by macrophages located in the tissue near the infection site etc. These cytokines produced can then stimulate the recruitment of phagocytes including the neutrophils and monocytes from the blood.
Answer:
The correct answer would be B) through meiosis only.
Any mutation in human being can pass onto the next generation only when it is present in germ cells.
Germs cells are the cells which lead to the formation of gametes (sperm in males and egg in females) through meiosis. It results in the formation of four haploid cells (gametes) from a single parent germ cell.
Mutation in somatic cells (divide by mitosis) will pass onto the daughter cells in the organism but will pass on to the next generation.
Hence, meiosis is the process by which a mutation may pass onto next generation in human beings.
