Answer: to fight against foreign antigens
Explanation: lymphocytes is a type of white blood cell that helps fight against invaders or foreign body in our body system. They are found mostly on the lymph and blood
There are basically two types of lymphocytes;
T lymphocytes- It develops from the thymus and Its functions by identifying intruders and then respond by eliminating them.
B cell or lymphocytes develop from the bone marrow hence the name B cell. It functions by creating some antibodies that destroy the effect of invaders that causes adverse effect.
I think that the answer is d
A.) Veins in the pulmonary circuit carry oxygen-rich blood
red blood cells are used to circulate oxygen through out the body, thus it is true.
Answer:
It just seems like you're supposed to give four pieces of evidence of natural selection. If you're still confused, you can always ask your teacher.
Explanation:
Answer:
a population or community.
Explanation: