Fossils of the earliest known true hominids are
approximately how many millions of years old?
a. more than 20
b. about 10
c. between 5 and 2
d. less than 0.5
e. none of these
Answer: c
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In Paine’s study, the starfish are the top predators in this system and eat each of the other
species mentioned. Whelks eat both mussels and barnacles, while both mussels and barnacles are filter feeders that feed on small particles in the water, including algae and other autotrophs. In terms of the number of organisms, you would expect __________ to have the highest number of individuals
a. mussels b. whelks c. starfish d. both whelks and starfish
The odontophore of molluscs is part of the:
a. digestive system. b. nervous system. c. excretory system. d. defense system. e. reproductive system.
How can minerals captured via immobilization be released back into the soil?
A) via microbivores B) via fungal absorption of minerals C) via herbivores D) via plant reuptake
Humans domesticated the rose from a wild ancestor with large, scented flowers. Why might fragrant chemicals in flowers be adaptive for wild roses?
A) They attract herbivores.
B) They repel seed dispersal agents.
C) They attract pollinators.
D) They prevent seed germination.