Which of the following groups of amphibians are legless and live under the leaves in the tropical rain forests?
a) Caecilians
b) Frogs and Toads
c) Salamanders
d) Glass Snakes
e) Cave Salamanders
Answer: a) Caecilians
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Tropical; grassland with scattered trees; seasonally dry; nutrient poor soils; large grazing mammals.
A. desert B. savanna C. taiga D. temperate grassland E. tropical rain forest
If ATP production was regulated by positive feedback, then high levels of ATP in muscle cells would
A. stimulate more ATP production. B. inhibit more ATP production. C. not alter ATP production. D. stimulate ATP degradation. E. All of the answers for this question are correct.
Stomata open when K+ concentration in guard cells ____, followed by water ____ the guard cells by
osmosis.
a. increases, entering b. decreases, entering c. decreases, leaving d. increases, leaving e. increases H+, leaving
Which of the following is a representation of gene density?
A) Humans have 2900 Mb per genome. B) C. elegans has ~20,000 genes. C) Humans have ~20,000 protein-encoding genes in 2900 Mb. D) Fritillaria has a genome 40 times the size of a human.