What is proof that all living things have a common ancestor?

A tiger sprints across a field to hunt its prey. Which molecule would provide the quickest energy for the tiger?

Ecologists have observed a sharp increase of sulfur dioxide in the air. What might be a possible consequence of excessive sulfur dioxide in the air?

Which of the following is an example of a group of prokaryotic organisms? A. Fungi B. Protists C. Archaea D. Eukarya

List the functuons of proteins

What process uses atomic particles of carbon and uranium to determine exact age? 1. Radioactive dating 2. Law of superposition 3. Relative dating4. Geologic time

Which sources do scientists use to reconstruct past climate conditions? Check all that apply. fossils frozen in glaciers daily temperatures pollen grains preserved in sediment running water tree rings

In beetles, the gene for color and the gene for pattern are located on the same chromosome and exhibit recombination.

Nucleic acids are composed of monomers called?

Cyclic amp (camp) stimulates one's metabolic rate. many supplement companies offer products claiming to increase the levels of this chemical within the body.

Injecting a person with a killed-bacteria vaccine can protect that individual from a disease because the proteins of the bacteria: A) remain in the body and live bacteria later prey on them instead of live tissue B) blind with receptors in the body,