A) They are photosynthesizers, providing energy and nutrients to the other organisms in the ecosystem.
B) They are important fermenters, used by humans to make foods and beverages.
C) They are a primary food source for vertebrate consumers; without them, vertebrate diversity would be very low.
D) They are decomposers, breaking down dead organisms and helping to recycle their nutrients.
E) All of the above .
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Multiple Choice
A) chordate.
B) nematode.
C) mollusk.
D) arthropod.
E) echinoderm.
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Short Answer
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Multiple Choice
A) You see more snails in the dry forest than you see in the rainforest.
B) You see more amphibians in the dry forest than you see in the rainforest.
C) You see ferns in the dry forest but not in the rainforest.
D) You see bryophytes in the rainforest but don't find them in the dry forest.
E) You see more reptiles in the rainforest than you see in the dry forest.
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Multiple Choice
A) its isolation from the rest of the continent during the last 20,000 years would cause the organisms living there to accumulate unique alleles and traits not shared with their close relatives.
B) it is surrounded on three sides by water, continuing the physical isolation that causes unique traits to accumulate.
C) the Olympic Mountains create a massive cooling effect, which in turn leads to unique selection pressures on the peninsula's organisms.
D) A and B
E) A, B, and C
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Multiple Choice
A) vascular, seeds, flowers, and cones
B) nonvascular, vascular, seeds, and flowers
C) nonvascular, seeds, vascular, and flowers
D) vascular, seeds, flowers, and nonvascular
E) vascular, seeds, nonvascular, and flowers
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Multiple Choice
A) on, in ,and under vegetation.
B) on and in animals.
C) in and on top of soil.
D) in dead trees and animal carcasses.
E) All of the above.
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Multiple Choice
A) mollusk.
B) annelid.
C) arthropod
D) mollusk or an annelid; without more information, you can't tell which it is.
E) mollusk or an arthropod; without more information, you can't tell which it is.
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Multiple Choice
A) amoeba
B) Giardia lamblia
C) Saccharomyces cerevisiae
D) euglena
E) Trichomonas vaginalis
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Multiple Choice
A) a fisher
B) a mushroom
C) a slime mold
D) a proteobacteria
E) a rose
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Essay
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Short Answer
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Essay
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Multiple Choice
A) There are more prey species than predator species.
B) There are more predator species than prey species.
C) There are an equal number of predator and prey species.
D) Predators have little impact on an ecosystem.
E) Most predators have many natural predators.
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Multiple Choice
A) comparative anatomy
B) DNA similarities
C) homologous structures
D) anatomical evidence
E) fossil evidence
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Multiple Choice
A) They are single celled.
B) They have chloroplasts.
C) They have a vacuole.
D) They have a nucleus.
E) They are photosynthetic.
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Multiple Choice
A) autotrophic
B) heterotrophic
C) decomposer
D) saprotroph
E) All of the above.
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Essay
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Multiple Choice
A) annelid.
B) cnidarian.
C) mollusk.
D) arthropod.
E) echinoderm.
Correct Answer
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