How do scientists use relative and absolute ages of rock layers to estimate the ages of fossils?

Similar cells that are grouped together and perform a common function are called

An environmental group is opposing a proposed dam on a river. Damming the river would create a reservoir of water that could be used to supply drinking water to the surrounding community.

Difference between endocytosis and exocytosis

The fetus is protected from certain infections, to which the mother is immune, by

When is selective breeding okay and when is it not? Provide evidence.

What type of bond links monomers together to form polymers? using the analogy of a train, if cars represent amino acids, what does the entire train represent?

Differences among individuals of a species are referred to as

J. What differences can you see when you compare the nucleus of a dividing cell with that of a non-dividing cell?

What is the energy of a photon first used to do in photosynthesis?

Select the correct statement regarding chemical synapses. A) Cells with gap junctions use chemical synapses. B) The release of neurotransmitter molecules gives cells the property of being electrically coupled.