The organs of the heart and the blood vessels form which of the followings?

A. a cell

B. a tissue

C. an organ

D. an organ system

blooms in ponds are caused by___. a. archeabacteria b. cyanobacteria c. cocci d. viruses

Which of the following processes directly require ATP? Choose all that apply. a. Diffusion of calcium into the motor neuron at the neuromuscular junction. b. Release of cross-bridge (interaction) between actin and myosin. c.

From higher to lower the two layers that plants make up in a tropical rain forest are the

Which blood vessels supply deoxygenated systemic blood to the alveoli?

How long does nuclear waste need to be safely stored until it is no longer hazardous?

Is the force that circulates blood electrical?

Summarize how movements of tectonic plates have influenced climate and life on earth

What are the three types of chemical bonds

In a pond, algae has 10,000 kcal of available energy. If the zooplankton which consumes the algae has 1,000 kcal of available energy, what is the available energy to the minnows that consume the zooplankton?

Why are the symptoms of vascular neurocognitive disorder so different in each patient?