(Question)
Q: What class of animals includes the subgroups rodents, carnivores, insectivores, bats, and primates? Choices: - insects - reptiles - amphibians - mammals A:
(Answer)
mammals

(Question)
Q: What is secreted by the cells surrounding spermatogonia to help sperm production? Choices: - estrogen - dihydrotestosterone - follicle stimulating hormone - testosterone A:
(Answer)
testosterone

(Question)
Q: What is the term for a symbiotic relationship in which one species benefits while the other species is not affected? Choices: - parasitism - mutualism - pollenation - commensalism A:
(Answer)
commensalism