Many penguins and fish have a lighter color on the belly than the rest of the body. This is often called counter shading and increases their camouflage in water when viewed from below. This is an example of:

Which of the following structures is not found in animal cells?

If the population allele frequencies at a locus are 0.6 allele A1 and 0.4 allele A2, what is the expected frequency of homozygote A2A2 individuals under Hardy-Weinberg equilibrium conditions?

RNA was likely to have been an important macromolecule in the early evolution of life because it has the ability to store information and can self-replicate. What other function might RNA have provided?

Resistance to a wide variety of insecticides, fungicides, antibiotics, antiviral drugs, and herbicides has evolved in hundreds of insects, fungi, bacteria, viruses, and plants. Which of the following is the best explanation?

A researcher wants to introduce the human gene encoding tissue plasminogen activator (used to dissolve blood clots) into a mammal so that the protein will be secreted into the milk of the mammary gland. What is required for the researcher’s success?

A DNA specimen that contains 20% guanine has           thymine.

Genes organized into an operon are beneficial to certain bacteria because the operon allows for

Individuals evolve when…

Evolutionary biologists work towards matching the way organisms are named (i.e. species, genus, family, etc.) with their evolutionary history (i.e. family tree). In other words, they work towards matching ______ with ______.