Which of the following is an example of a learned response in animal behavior? a. a spider spins a web.
b. a beaver builds a dam.
c. a bear fishes for salmon in a river.
d. a goose migrates south for the winter.

Describe two recent or ongoing space missions.

What is the cause hearing loss in human being

The large increase in atmospheric carbon dioxide in the last 50 years most likely comes from a. an increase in cellular respiration b. increased decomposition by bacteria c. an increase in the burning of fossil fuels d. an increase in photosynthesis