Which of the following is a biotic factor that could reduce a population of frogs?

When a jellyfish paralyzes a tiny fish with its tentacles, the fish is the

In a marine ecosystem, the remora attaches to the belly of a shark and feed off the scraps. The shark is not afffected by the relationship. This is an example of which symbiotic relationship?

What would happen if there were no fungi and bacteria on Earth?

Which of the following is MOST responsible for making a fallen tree decay and become an important part of the soil?

Which ecosystem is found where fresh water of a river and salt water of the ocean meet?

Which biome is most common in Africa?

In a certain habitat, young deer were the main source of food for wolves. A severe snowstorm kills many of the young deer one year. Which of the following best describes what probably occurred the next year?

What is the name of the small flap that seals off the trachea during swallowing?

The role of the respiratory system is to bring what substance into the body?

What kind of motion is possible with a hinge joint?

Oxygen rich blood travels AWAY from the heart through

Lichen results from a symbiotic relationship between algae and fungi. In this relationship each organism helps the other survive. This is an example of

Decomposers depend on consumers because

After walking through a field, you find a tick attached to your leg. What is the tick's relationship to you?

Ponds and rivers are two types of

A bird eats a caterpillar that ate a tree leaf. The tree is an example of a

Which organ system is responsible for removing or helping waste EXIT the body?

If a person lacked platelets, which process could not take place?

Which biome, because of its climate (warm and humid), has the largest number of species of plants and animals?

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