Populations and the Environment Answers

What is an organism’s niche?

Why is a shell considered to be biotic?

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 a biotic factor?

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?

Elephants shape their environment in many ways. They can change a forest to a grassy field or dig a hole that might become a pond. They clear large amounts of vegetation, which removes habitats for some organisms but makes the area inviting for other organisms. Which best describes possible interactions of elephants with the surrounding ecosystem?

A rock is classified as

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?

Which describes a grizzly bear’s habitat?