The energy required for muscle contraction comes from

A. ATP.

B. ligaments.

C. oxygen.

D. chlorophyll.

How does zebra mussels have an effect on chlorophyll?

Which statement describes characteristics of planarians? They live in oceans, are parasites, and reproduce only sexually. They live in fresh water, are parasites, and reproduce only asexually.

Starting from the sun, can you create a food chain of three organisms?

How could a pregnant woman determine whether her child could be born with albinism

A cell requires energy to move materials from an area of low concentration, across the cell membrane, to an area of high concentration. This process is called

What can happen when earth materials overcome the force of friction holding them together? A. a flood B. a landslide C. erosion D. wildfire

The Sun's gravity pulls the Earth toward it and keeps it from floating away into space. What keeps the Earth from being pulled into the Sun? A) the Sun's gravity B) the Moon's gravity C) the Earth's gravity D) the Earth's sideways motion

A nurse is in the dining room and overhears a new nurse tell a client with body dysmorphic disorder that she's much too thin and must eat more before she can go home. the client bursts into tears and runs out of the dining room.

Meiosis is responsible for

Which of the following examples illustrates a pivot joint in use? A. you wind up to pitch a baseball B. you wave good bye to your friend C. you kick a football D. you look behind you