What factors interact to produce smog? select one:

a. sunlight and pollutants from fossil fuels

b. sunlight and oxygen

c. particulates and pollutants from fossil fuels

d. sunlight and acid rain?

Is reproduction necessary for the survival of a species?

What is the list of the six kingdoms of classification from simplelest to most complex?

How do the promoter and operator work together to control gene expression?

Which of these is NOT considered to be an organic substance? A) carbohydrates Eliminate B) lipids C) metals D) proteins

Which term describes the difference in the concentrations of a substance across a cell's membrane? a. Diffusion membrane b. Concentration membrane c. Concentration gradient d. molcular concentration

The insertion of the human insulin gene into the bacterium Escherichia coli allowed it to produce human insulin. Which type of organism is E. coli?

When do introduced species become invasive?

If arthropods' appendages were not jointed, how would that affect them?

A student decides to set up an experiment to see if detergent affects the growth of seeds. he sets up 10 seed pots. 5 of the seed pots will receive a small amount of detergent in the soil and will be placed in the sun.

When a liquid or gas is no longer heated, the convection currents what?