Ans: E) microscopic, single-celled algae (protists) called phytoplankton ("plant-like drifters")
In open-water marine ecosystems, the ________ occupy the same trophic level as the giant sequoias (redwoods) in the forests of California
A) fast-swimming, fish-eating tuna
B) giant, squid-eating whales
C) microscopic bacteria that decompose all the other organisms once they have died
D) tiny, multicellular zooplankton ("animal drifters") that feed on phytoplankton
E) microscopic, single-celled algae (protists) called phytoplankton ("plant-like drifters")
Biology & Microbiology
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The allantois
A) destroys old blood cells. B) gives rise to the yolk sac. C) forms blood cells. D) is part of the placenta.
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A hybrid zone is defined as an area where two populations may breed and produce ____
a. inviable, sterile offspring b. viable host races c. inviable hybrid subspecies d. viable, fertile offspring e. viable, sterile offspring
Biology & Microbiology
Which of the following are used as antibiotics?
a. secondary metabolites of fungi b. bodies of lichens c. systemic mycoses d. fungal pathogens
Biology & Microbiology
Animals release energy from food by warming the food
a. true b. false
Biology & Microbiology