Above 38oc and below 0oc the rate of photosynthesis decreases. propose a hypothesis to explain why this occurs.

a: enzyme activity decreases at these temperatures
b: at these temperatures plants wilt
c: chlorophyll cannot absorb energy from the sun at these temperatures
d: the cytoplasm of the plant cell cannot function

Awic dietitian is meeting with a client who has an infant and a young child. the mother says that the young child is a very picky eater and will only eat crackers and juice. the health worker notices that the child's hair is brittle, his nails tear easily, and the skin inside his lower eyelids is very pale. these are all signs of iron deficiency.

The smallest parts of these that retain their original properties are called

Why can cancer in the lymph nodes (lymphoma) be particularly dangerous? a. the lymph node's ability to produce cancer-fighting lymphocytes would be compromised. b. the lymph node's ability to produce cancer-fighting lymph would be compromised. c. the lymph nodes produce lymph, which nourishes growing cancer cells. d. the lymph nodes produce chyle, which nourishes growing cancer cells.