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Which of the following animals has the highest mass specific oxygen consumption?

Compared with plants growing in shade, plants growing in sunlight tend to have smaller

The specific traits of a particular organism enabling it to survive, grow, and reproduce within a given environment are called

Natural selection favors the age at maturity that results in the greatest number of ________ produced over the lifetime of an individual.

Which of the following is done by toads to avoid hot, dry periods of the year?

The pattern shown in figure 9.6 best resembles

An advantage of homeothermy is

When the amount of water in soil exceeds what the pore space can hold, the soil is

Pacific salmon migrate upstream and after breeding, soon die. They are termed

________ stochasticity is the random variation in birth and death rates that occurs in populations from year to year as a result of natural disasters and other annual variations in the environment.