Answer:
activate memory cells is lymphocytes
engulf and digest pathogens is phagocytes
and produce antibodies is lymphocytes
Explanation:
The limbs of the organisms are similar because they are formed in similar ways during embryonic development and share similar arrangements.
The primary and most significant greenhouse gas emitted from human activities is carbon dioxide. Burning of fossil fuels is the major cause of increased carbon dioxide emission.The burning of coal, oil, and natural gas is an important energy source to produce electricity.
Answer:
2nd one is the most realistic of what occurs in ecosyystems
