Answer:
1. A natural killer cell identifies unusual cells, combines with them, and discharges perforin and molecules of granzyme that stimulates apoptosis.
2. A basophil comprises huge concentrations of histamine in granules, gets stain with basic dye methylene blue, and helps in inflammation and allergic reactions.
3. A macrophage refers to a huge agranular phagocyte, which is found within the tissues like lungs and brain.
4. An eosinophil comprises histamine and major basic protein in granules gets stain with acidic dye eosin and helps in reactions against the helminths and protozoa.
examples of vestigial structure would include the tail bone, wisdom teeth, and the appendix. hope this helps :)
Answer:
This is usually the first day of menstruation - the day when the uterus lining starts to be shed.
Explanation:
Yeah the answer above me makes sense...
