Which statements correspond to amphibolic pathways? 1. anabolic and catabolic reactions are joined through common intermediate 2. shared metabolic pathways 3. Feedback inhibition can help regulate rates of reactions 4. both types of reactions are necessary but do not occur simultaneously
A) 1 only
B) 1, 2, 3
C) 1, 2, 3, 4
D) 2, 4
E) 2, 3, 4
B
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Cleavage produces a(n) __________ stage embryo. Fill in the blank(s) with the appropriate word(s)
You had a cold last month and you caught another one this month from your daughter. What is the most likely cause
of this? a. Memory cells were not formed as a response to the first cold. b. The antibodies formed as a response to the first cold were degraded. c. The two cold viruses are significantly different. d. Your T cells are not working properly. e. Your antigen-presenting cells do not recognize the second cold virus.
In a hypothetical food chain consisting of grass, grasshoppers, sparrows, and hawks, the grasshoppers are
A) primary consumers. B) primary producers. C) secondary consumers. D) tertiary consumers.
Phosphorus can be obtained from organic sources only.
Answer the following statement true (T) or false (F)