Which are the major structures of the integumentary system? Select three options.

bones

hair

joints

muscles

nails

skin

tendons

A tobacco company funded Amelia to run experiments and publish a paper. She spent a year completing several experiments to find a way to process tobacco leaves that would be better for health.

The scientific name of an organism is formed from what two parts of the organism's classification?

Specific molecule that an enzyme fits

What human body system sends signals to glands in the endocrine system to release hormones? A. circulatory system B. excretory system C. nervous system D. digestive system

What is the function of flamentous bacteria

Materials used or produced by living things are?

Many virues infect only a certain type of cell because they bind to certain

What can be bio-genetically grow tissues and organs

Whole muscles can respond in a graded fashion to stimuli by varying Select one: a. the force of contraction of individual muscle fibers. b. the number of motor units recruited. c. the amplitude of the action potential. d. the frequency of stimulus.

Why does the oxygen atom in water a molecule have a negative charge