Fish lice live on host fish as a parasite. The fish lice feed on the blood and other fluids in the fish. What is the likely outcome for the consuming parasite living on a host?

Choose the words or phrases tho complete the sentence. Limiting factors cause the size of populations to _____________ or to __________________.

A forest ecosystem has different levels of organization. Choose the correct levels of organization of the ecosystem in order so the smallest level with the fewest things to the largest level with the most things.

Groundhogs inhabiting a meadow environment drink water and rely on plants, including clover, for food. Which of the following terms describe both the water and the clover that the groundhogs consume? Choose the correct answer.

The American Plains bison is a grassland species that eats mostly grasses. By the late 1800s, hunting came close to causing this animal to disappear from the western United States. In the early 1900s, landowners and the U.S. government took steps to save the bison. The graph shows data collected in northern Yellowstone National Park between 1902 and 1915. What information do the y-axis values on the graph represent?

The American Plains bison is a grassland species that eats mostly grasses. By the late 1800s, hunting came close to causing this animal to disappear from the western United States. In the early 1900s, landowners and the U.S. government took steps to save the bison. The graph shows data collected in northern Yellowstone National Park between 1902 and 1915. Which of the following events could have caused the change shown in the graph? Choose the correct answer.

What do frogs, deer, and raccoons have in common?

Which of the following is a producer?

A carnivore eats which of the following?

In a forest habitat, the white-tailed deer eats tree leaves and grass while a Cooper’s hawk hunts for small rodents and birds to eat. In the ground, earthworms break down dead grasses and leaves. In the forest habitat described here, the white tailed deer is classified as a

Which organisms feed on the remains of dead plants and dead animals?

In the food web, what is the ultimate source of energy?

Bears and coyotes both consume large plant-eating mammals such as deer. When the deer are in short supply, bears and coyotes may fight over the prey. This type of biological interaction is called

This is a type of symbiotic relationship where both organisms benefit.

A tapeworm is an organism that lives inside the intestines of larger animals, including man, and absorbs nutrients from its host. This type of symbiotic relationship is called

A lion is a _____________ of a gazella.