What must happen for scientific theories to be excepted as valid

In which way do viruses depend on living cells? a. they get nutrients by entering cells b. they get energy from photosynthesis c. they make copies of themselves using cell parts d. they develop into larger viruses using cell parts

Fine sand particles are placed on a on a paper plate and the plate is set on top of a stereo speaker. The stereo is turned on and the music is played very loudly.

What happens during primary succession?

What is the most general group into which organisms can be classified

In what position should the ankles, knees, and hips be during the takeoff position of the squat jump?

Soil formation is most influenced by__. Wind speed. Cloud cover. Air pressure. Rain fall.

What is the basic cause of ocean tides? A. Gravitational attraction between the Moon and the entire solar system B. Gravitational force of atmospheric pressure C. Gravitational force of volcanic activity D.

Which type of chromosomal mutation causes this form of Down syndrome?

Chlorine is added to kill remaining microorganisms in the water. true or false.

Sensation is the process by which our sensory receptors and nervous system take in stimulus energies from the environment;