Genetic expression in eukaryotic cells is controlled by transcription factors, which are a. carbohydrates b. lipids c. proteins

Which would be an adaptation in a rainforest, but not in a tundra? a. ability to store water for a long time b. fur that blends in with snow c. strong claws for killing prey d. a beak that can dig into thick trees

Sea stars, sea urchins, sand dollars, and brittle stars are all memeber of a group, what is the common name of the group they are all in

In which situations is the principle of cross-cutting relationship useful in determining relative age?