Which of the following is an example of an annual rhythm? a. the mating of fish after the higher of two tides has peaked
b. waking up in the morning without an alarm clock
c. an antelope giving birth to its young just after the rainy
d. great horned owls feeding and hunting at night
season

As the dry, hot season approaches, the internal processes of some
animals slow down until their body activities almost stop. This
special way of dealing with dry, hot weather is called
a. hibernation
b. habitation
c. meditation
d. estivation

In order to have an unending supply of certain chemicals in the
world, such as nitrogen and carbon, these chemicals must be
a. added to from an outside source
b. recycled, or changed from unusable to usable forms
c. used in small quantities to conserve them
d. fixed in the atmosphere so they will always be available