Which of the following are the most abundant leukocytes in blood, so they are often the first responders at a site of infection?
A. Macrophage
B. Neutrophils
C. Basophil
D. Cytokines
E. Dendritic cell
Answer: B
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In the experiment above, guppy color patterns (spots) were measured in populations exposed to increasing amounts of predation. From this you could conclude that ____ .
A. evolutionary changes take millions of years to appear
B. predators are less likely to catch and eat brightly colored guppies
C. predators are more likely to catch and eat brightly colored guppies
D. brightly colored guppies are more likely to reproduce in the presence of predators
E. predators do not affect the color patterns of guppies
Bruce Reimer was born with ambiguous genitalia
a. True b. False
Why do fat-free diets affect the production of steroid hormones?
What will be an ideal response?
In __________, one of the sperm cells in the pollen tube fertilizes the egg, forming a diploid zygote; the other fuses with the central cell, forming a triploid cell.
Fill in the blank(s) with the appropriate word(s).