While the misuse of androgens can negatively impact males, there are no negative effects of androgens for females.
Answer the following statement true (T) or false (F)
False
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The activation of helper T cells is likely _____
A) when an antigen is displayed by a dendritic cell B) when a cytotoxic T cell releases cytokines C) when natural killer cells come in contact with a tumor cell D) in the bone marrow during the self-tolerance test E) when B cells respond to T-independent antigens
The Hardy-Weinberg law is used to calculate allele and genotype frequencies ____
a. in small populations b. when mating is random c. in migrating populations d. when some alleles confer an evolutionary advantage over other alleles e. the population descends from a single ancestor
Polar bodies
a. are dumping places for excess genetic material. b. have no known biological function. c. are produced by meiosis. d. will serve as the gametes if something happens to the egg. e. all of these are true EXCEPT “will serve as the gametes if something happens to the egg.”
Birds have scaly feet and lay amniotic eggs. This supports the idea that:
a. reptiles evolved from amphibians. b. birds are the only creatures to ever have feathers. c. birds are endothermic. d. birds evolved from reptiles. e. None of the above.