Cell-mediated immunity is directed primarily microbes that survive in phagocytes and microbes that infect non-phagocytic cells. It is most effective in destroying virus-infected cells, intracellular bacteria, and cancers. It also plays a major role in delayed transplant rejection.
Answer:
cooler denser air produces an area of higher air pressure and moves in under rising air
Explanation:
Answer:
The correct answer is leaves, spines are modified leaves.
Explanation:
Cactus have spines, the thorn-like thing, in which replace leaves. These spines lower the surface area of the cacti reducing water loss. These spines are actually advance modified leaves which rise according to their environmental conditions.
The stem of a cactus is also thick and fleshy which allows it to store water. The cacti's stem also has a waterproof waxy kind of layer to help retain more water.
Thus, the spines of a cactus plant are nothing but a modified leaf.
Answer:
Growth, excretion, energy, reproduce
Explanation:
A plant has the ability to makes it own food via photosynthesis unlike cars (they arent living because they don't have growth and reproduce)