How long are food chains?

Question 7 options:

four steps long

three steps long

it varies with day length

it varies with ecosystem

If two forces push or pull an object will the object move

Which person would need more body fat than the others? a. A pregnant woman b. A high school basketball player c. A professional ballet dancer d. A bodybuilder e. A ranch hand in Phoenix, Arizona

Scientists used to say that all living things depend on the sun. Explain why this statement is no longer valid?

Which of these is a reliable source of information about claims that large doses of vitamin C prevent colds? A. A report that summarizes research on vitamin C published in a peer-reviewed scientific journal. B.

Why are the primers used to amplify the D1S80 region complementary to unique sequence outside the actual repeats, instead of using primers that would be directly complementary to the actual repeats?

Which of the following is true concerning the earth's geologic plates? They are affected by climate change They dont move They move They are effected by the earth's weather

Which answer correctly compares the Krebs cycle and the electron transport chain?

What would happen if u remove a level from the levels of organization

For a constant voltage increasing the temperature will

Many years ago, a scientist grew pea plants that produced wrinkled peas. The peas from these plants produced new plants that also produced wrinkled peas.