In which animals would diffusion alone not be an effective transport mechanism for gas exchange?
a. nematodes
b. sponges
c. cnidarians
d. annelids
e. flatworms
d
Biology & Microbiology
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The forward thrust of swimming sharks is created by:
a. the pectoral fins. b. the pelvic fins. c. the dorsal fin. d. the caudal fin. e. the anal fin.
Biology & Microbiology
Most leaf cells are no more than ____ from a xylem vein
a. one inch b. one centimeter c. half a millimeter d. 50 micrometers e. two inches
Biology & Microbiology
A third level consumer may eat
a. herbivores. b. primary producers. c. primary carnivores. d. second trophic level organisms. e. none of these.
Biology & Microbiology
Emery believes mucus is unhealthy, so he is always spitting it out. Explain to Emery why mucus produced by the GI tract is beneficial
What will be an ideal response?
Biology & Microbiology