The single factor tested in an experiment is:

a. the control

b. the variablec. the datad. the hypothesis

if you see a sedimentary outcrop and red layers of sand are at the top of pale layers of rock, what does this tell you about the ages of the rock layers?

When did prokaryote evolve

Name the 4 possible types of deposits made when a river flattens out

Why do smaller animals lose heat at a faster rate than larger animals

A red-eyed female is mated to a white-eyed male. what percentage of the male progeny have red eyes if the parental female was heterozygous (xw+xw) ?

Where do you think this heat lamp is being used?

Battery disposal is a disadvantage of which form of energy?

If a cell has 4 pairs of chromosomes, after mitosis each daughter cell will have how many chromosomes?

Which two families of flowering plants provide protein for the majority of humans?

A. what are the primary abiotic factors that will affect life underwater? b. Explain how the abiotic factors such as depth, Temperature, and some other mentioned in the questions before affect aquatic organisms.