What structures make up the large surface area for gas exchange in fishes?
What will be an ideal response?
There are many gills, each of which is made up of many filaments that are covered by thin folds of tissue called lamellae.
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In male mammals, excretory and reproductive systems share the _____
A) testes B) urethra C) seminal vesicle D) vas deferens E) prostate
Crassulacean acid metabolism (CAM) is a form of photosynthesis that
A. encourages the light-independent reactions to take place at night. B. allows photosynthesis to take place without water. C. encourages the light-dependent reactions to take place at night. D. allows photosynthesis to take place without carbon dioxide.
Alternate forms of the same gene
a)do not exist. b)are alleles. c)are homologs. d)are sister chromatids. e)do not occur in the same individual.
Trypanosoma cruzi is introduced into the body by
A) feces containing trypomastigotes contaminating a bite wound. B) the bite of a tsetse fly, which introduces the trypomastigotes into the body. C) ingesting food contaminated with the parasite. D) the bite of a sand fly that has ingested phagocytes containing the parasite. E) wearing contact lenses cleaned with contaminated tap water.