This mechanism allows killer T-cells to hunt down and destroy cells that are infected with germs or that have become cancerous.
The other main type of T-cells are called helper T-cells.
Helper T-cells orchestrate an immune response and play important roles in all arms of immunity.
Answer:
Major structural differences between a plant and an animal cell include: <u>Plant cells have a cell wall, but animal cells do not. Cell walls provide support and give shape to plants. Plant cells have chloroplasts, but animal cells do not.</u>
Explanation:
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Answer:
There are several different morphologies that describe particular bacteria and archaea. Archaea can have a round (cocci) shape or a rod (bacilli) shape.Bacteria can also be circular, rod, or a spiral shape (spirochete).
Answer: false
Explanation:
Individuals do not evolve as a result of natural selection over successive generations. Populations evolve ONLY as certain traits become more common and others go away.
