Which organism was the first to develop in the absence of oxygen?

A.

algae

B.

cyanobacteria

C.

prokaryotic

D.

eukaryotic

What causes the electric charges to flow from one end of the battery to the other? a balance in electric potential a balance in resistance a difference in electric potential a difference in resistance

Competition for resources drives this process. Cloning Asexual reproduction Natural selection Genetic mutation

An experiment is designed to test what color of light will activate a photoelectric cell the best. The photocell is set in a circuit that "clicks" in response to current. The faster the current, the more clicks per minute.

Which of the following is an example of a device that uses a wheel and axle? Check all that apply A. frisbee B. light bulb C. doorknob D. bicycle (multiple answers)

The spring in a toy rocket launcher has a spring constant of 80 N/m. How far must you compress the spring to cause it to exert a force of 2 N

Objects become electrically charged as a result of the transfer of

How many electrons do most atoms seek to have on their valence shell? Using this information, explain why certain elements are unreactive and why other elements are reactive.

Which of the following statements is good advice to prevent becoming overly emotional? A. There is no way to prevent becoming overly emotional. B.

An ant is on the pendulum bob of a clock. What would be its displacement in one time period?

Every charged particle in the universe is surrounded by its own? A. both an electric and gravitational field B. Gravitational field C. Charged field D. Electric field E. Both and electric and charged field