The enzyme that unwinds that double stranded DNA at the beginning of DNA replication is called A. Primase. B. helicase C. topoisomerase. D. DNA polymerase

All of the sinuses, as a group, are known as the: A. maxillary sinuses. B. sphenoid sinuses. C. ethmoid sinuses. D. paranasal sinuses.

Select the correct statement about the evolution of animals. a. No animal fossils are found in strata formed before the Cambrian explosion. b. The oldest generally accepted fossils of large animals range in age from 565 to 550 million years old. c.

As longitudinal wave travel particles in the medium are pushed together and then pulled apart. we call this

What occurs in nondisjunction and what effect does it have on the resulting cells?

Which statement is true? O A. A hypothesis must be based on the researcher's analysis of the data collected in the experiment. O B. A hypothesis must be testable for it to be useful in scientific research. O c.

Fish in a marine environment must maintain a relatively constant ion concentration in their tissues and blood. How do the chloride cells in the gills aid fish in the removal of excess ions? A.

Name three groups of plastic sedimentary rocks

A section of DNA that carries enough information to make a single protein is called a (an) A. codon. B. enzyme. C. gene. D. intron.

During the winter months, water on the surface of a pond will typically freeze and this ice acts as an insulator for the water beneath it. As a result, aquatic life is able to survive during the cold winter.

Organism that grows in colonies and made up of Eukaryotic