Fungi play what important role in the environment?
A. They perform photosynthesis and release oxygen into the atmosphere.
B. They are one of the few organisms that degrade lignin.
C. They form symbiotic relationships with plants.
D. Both A and B
E. Both B and C
F. All of the above
Answer: E. Both B and C
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Scientists unearth a Wooly Mammoth from the Siberian Ice Sheath and discover that a eukaryotic "amoeba"-like cell is still alive. Which component of the cell membrane might contribute to maintaining the fluidity of plasma membranes under freezing conditions?
A. peripheral proteins B. high levels of long fatty acyl tails within the lipid bilayer C. high levels of unsaturated fatty acyl tails within the lipid bilayer D. absence of cholesterol E. high levels of saturated fatty acyl tails within the lipid bilayer
The bright coloration of the various species of poison arrow frogs from the Amazon is
A. receptivity. B. aposematic. C. intimidation. D. Mullerian mimicry. E. Batesian mimicry.
The soft part of a plant body, such as a potato, consists largely of ____ tissue
a. sclerenchyma b. collenchyma c. parenchyma d. phloem e. xylem
Which situation would be most likely to form a fossil under normal environmental conditions?
A. A jellyfish that died in an estuary. B. A slug that died in leaf litter. C. A bird that died and fell to the forest floor. D. An elephant that died at the edge of a waterhole.