Larval salamanders eat small insects and crustaceans. These insects and crustaceans are
herbivores. Thus, the salamanders are __________.
a. primary producers
b. primary consumers
c. secondary consumers
d. tertiary consumers
C
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Depending on the type of regulatory mechanism, activators and repressors can bind to operator regions which control transcription
Indicate whether the statement is true or false.
Savannas typically occur in
A) cold areas with little rainfall in polar regions. B) cold areas with little rainfall at high altitudes in the tropics. C) very dry areas in the rain shadow of mountains of both temperate and tropical latitudes. D) warm areas with seasonal rainfall in the tropics.
Which plant has seeds that are the richest in protein?
A) wheat B) rice C) barley D) soybean
Why did internal fertilization likely evolve?
A. As an adaptation to life in a terrestrial environment. B. To increase the chances of successful fertilization. C. Because there were no safe places to lay eggs. D. As a response to copulation.