Populations and the Environment Answers

What is an organism’s niche?

A biologist counts the number of rabbits in a population each year and observes a decrease in population. Since the coyote population has exploded, the biologist concludes that the coyote population has had a negative impact on the rabbit population. Which describes the biologist’s actions?

Which describes a grizzly bear’s habitat?

Which is a biotic factor?

Many organisms depend on the land as a food source. Seasons can affect the amount of food that is available to these organisms. How would a long, cold winter most likely affect a population of deer?

Interactions between organisms and their environment impact the organism’s overall population. Zebra mussels are not native North America; they were brought here by ships travelling from Europe. They reproduce quickly and filter out plankton from the water reducing food for native fish. Native fish populations have started to decline. Which concept shows the relationship between zebra mussels and native fish?

Which relationship is shown in the graph?

Hunter is studying for his ecology test. Which fact would least likely show up in his notes?

Which is biotic?

Which describes the habitat of a frog?