Answer: They evolved from the same line as the cave bear, descending from Ursus abstrusus, a small, primitive black bear. Ursus Euarctos, a black bear, came to North America during the Pliocene Epoch before the brown bear.
Answer:
cell
Explanation:
activate memory cells is lymphocytes
engulf and digest pathogens is phagocytes
and produce antibodies is lymphocytes
The state of maintaining a stable internal environment regardless of changing external conditions is called .
the answer for me is the third option (c)
