1.2 Organism Interactions in Ecosystems

Cattle egrets foraging in fields among cattle. The egret gets easy access to food and the cattle don't care if they are there or not.

• mutualism
• commensalism
• competition
• parasitism

A tapeworm and a dog have this type of relationship.

• mutualism
• parasitism
• commensalism
• competition

Ostriches and gazelles feed next to each other. They both watch for predators. Because the visual abilities of the two species are different, they can each identify threats that the other animal may not see as readily. Both species benefit.
This is an example of which type of symbiosis?

• Commensalism
• Mutualism
• Parasitism
• IDK

Mistletoe extracts water and nutrients from the spruce tree to the detriment (ill effect) of the spruce.
This is an example of which type of symbiosis?

• Commensalism
• Mutualism
• Parasitism
• IDK

As bison walk through grass, insects become active and are seen and eaten by cowbirds. This relationship neither helps nor harms the bison.
This is an example of which type of symbiosis?

• Commensalism
• Mutualism
• Parasitism
• IDK

One organism hunts and eats another organism.

• predation

• mutualism

• carnivore

• parasitism

This occurs when niches overlap between species and they have to compete for resources.

• competition

• interspecific

• parasite

• intraspecies

A ________________ is the natural home or environment of a plant, animal, or other organism.

• habitat

• symbiosis

• food chain

• intraspecies

The graphs show how the number of mice predators (animals that eat mice) and the food source of the mice (plants) changed from 1996 to 2002.

Based on this information about predators and food, which year would you predict would have the highest population of mice?

• 1996

• 1998

• 2000

• 2002

A habitat is ___________________.

• the place or kind of place in which an animal or plant naturally lives.

• is how plants produce their own food.

• is an animal that only eats meat.

• the place where only one animal lives.