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

1) RNA polymerase

2) anticodon

3) codon

4) operon

Natural selection allows a species to change in response to its environment. What is the process by which a species becomes better suited to its environment called?

What characteristic differentiates high mass stars from low mass stars?

Roundworms reproduce sexually with external fertilization. a. True b. False

Biologists sometimes say that "natural selection depends on the specific environment where a species lives." What does this statement mean?

What is the name of the national level erp solution?

The fight-or-flight reaction occurs during which stage of gas?

The gene for flower position in pea plants exists as axial or terminal alleles. Given that axial is dominant to terminal, list all of the possible F1 and F2 genotypes and phenotypes from a cross involving parents that are homozygous for each trait.

What role does gravity play in mass movement

Why don't all plants have chloroplasts?

You step on something in the yard resulting in a puncture wound that does not bleed freely. antigens from any microbes that entered the wound will most likely end up in the