Answer:
a identification key
Explanation: because it identifys you
Answer:
population that is unchanging
Explanation:
Answer:
The second one is correct
Explanation:
A leukocyte is responsible for the immune system
Answer:
The balance of nature is a theory that proposes that ecological systems are usually in a stable equilibrium or homeostasis, which is to say that a small change will be corrected by some negative feedback that will bring the parameter back to its original "point of balance" with the rest of the system
Explanation: