Seth purchased five pounds of live crayfish and realized that the outer shells were made of a tough carbohydrate similar to that used to make the carapace of a cockroach. What do you think the outer shells of the crawfish are made of?
A. Glycogen
B. Chitin
C. Amylopectin
D. Cellulose
E. Fibrin
B. Chitin
Biology & Microbiology
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Courtship displays are a response to evolutionary pressure caused by
1.balanced polymorphism
2.heterozygote advantage
3.genetic bottlenecks
4.sexual selection
Why does a person continue to breathe heavily after prolonged activity?
A) because of lack of water B) to relieve fatigue C) to relieve O2 debt D) no reason
Biology & Microbiology
Similarity due to convergent evolution is called
A. analogy. B. homology. C. taxonomy. D. cladistics. E. phylogeny.
Biology & Microbiology
________ causes human yeast infections
A) Aspergillus B) Candida albicans C) Claviceps purpurea D) Amanita
Biology & Microbiology