Which is an arrangement of genes consisting of an operator, a promoter, and a repressor?

1) RNA polymerase

2) anticodon

3) codon

4) operon

In addition to protecting a prairie dog from predators, how does its home provide protection? The answer is; It protects the prairie dogs from threatening weather.

Which of the following terms describes a lipid molecule that has only single bonds between its carbon atoms?

What are all the mineral's names on Earth?

One characteristic of a lagoon is often: concentrated salt deep-sea fossils glacial till turbidity currents

The desert is very dry and hot during the day. there is a lot of direct sunlight. annual rainfall averages less than 10 inches per year, and that rain often comes all at the same time. the rest of the year it is very dry.

The closer together a magnet's magnetic field lines are, a. the weaker the magnetic field. b. the stronger the magnetic field. c. the closer they are to the magnet's center. d. the closer they are to disappearing.

What are two things that carbohydrates and lipids have in common? A. Both contain C, H, O and N and are formed by dehydration snythesis. B. Both contain C, H, O and serve as a source of energy. C.

Stellar equilibrium is a balance between what two things? A. Outward and inward gravity. B. Outward pressure from light and inward pressure from heat. C. Outward pressure from hydrogen and inward helium. D. Outward pressure and inward gravity

Which genotype represents a homozygous dominant allele? HH Hh hh

Why are mining companies looking for minerals?