Macrophages, neutrophils, and lymphocytes are different types of white blood cells, or
A. erythrocytes.
B. leukocytes.
C. thrombocytes.
D. platelets.
Ans: B. leukocytes.
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Eustachian tube connects the middle ear and which of the following?
Which process ensures that seeds produced in temperate climates will not germinate before spring?
a. dormancy b. scarification c. vernalization d. dispersal
One of the ways that cells balance anabolism and catabolism is to
A) use feedback inhibition to shut down a pathway that is not needed. B) use the same enzyme to run a reaction in both the catabolic and anabolic direction. C) use the same enzyme to run a reaction in both the catabolic and anabolic direction and use feedback inhibition to shut down a pathway that is not needed. D) use separate coenzymes such as NAD+ vs. NADP+ for catabolic vs. anabolic pathways. E) use feedback inhibition to shut down a pathway that is not needed and use separate coenzymes such as NAD+ vs. NADP+ for catabolic vs. anabolic pathways.
What is the probability of obtaining an individual with the genotype bb from a cross between two individuals with the genotype Bb?
a. 1/2 b. 1/4 c. 1/8 d. 0