This animal has spicules, digests its food in
collar cells, and is a hermaphrodite. This
animal is ___.This animal has spicules, digests its food in
collar cells, and is a hermaphrodite. This
animal is ___.
a. a sea anemone
b. a sponge
c. an earthworm
d. a clam
e. more than one of these
B
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The disinfectant screening method that is known as the ________ test, which is used to measure the potency of a disinfectant.
Fill in the blank(s) with the appropriate word(s).
What happens when a keystone species is removed from a population?
a. decreased intraspecific competition b. increased intraspecific competition c. species biodiversity decreases d. species biodiversity increase
The difference between gross primary productivity
and net primary productivity is the a. amount of sunlight reflected by plants. b. rate of photosynthesis of autotrophs. c. rate of energy utilization by autotrophs. d. rate of consumption of autotrophs by herbivores. e. net ecological productivity.
The first photosynthetic organisms to obtain hydrogen by splitting water were the cyanobacteria
______________ Indicate whether the statement is true or false.