What kind of energy is used for the flexing of an arm muscle1. electrical energy2. gravitational potential energy3. mechanical energy

Why is zea diploperennis an important species?

Which of these transports nutrients made in the leaves to all parts of the plant?

3. Antibodies fight infections by (a) eating microbes before they can attack cells. (b) binding to antigens and rendering them inactive or harmless. (c) injectiſg cells with a harmless form of an otherwise harmful virus.

The skull is designed to A. protect the brain. B. control how the body moves. C. protect the larynx. D. produce brain cells.

What are 3 ways the scientific community reviews scientific results

What is true about psychosocial changes observed in adolescents? select all that apply?

This causes substances to move across the cell membrane, against the concentration gradient. Select one: a. active transport b. neutral transport c. passive transport d. hydrophobic transport

1. The nerve impulse is an electrical current that travels along dendrites or axons. True or false

What led to the conclusion that single-celled prokaryotic organisms evolved in the absence of oxygen

What happens when you touch something too cold?