A shark's skin is so abrasive that some ancient peoples used it as what?

Which of the following statements would best describe Pseudacris crucifer? A. larger than 1.5 inches, larger than 6 inches, warts, X-shaped mark on back B. larger than 1.

What are the three main components of biodiversity? a. Species diversity, species productivity, and species stability b. Genetic diversity, species abundance, and species evenness c. Species richness, species abundance, and species evenness d.

Is a membrane required for facilitated diffusion

Which of the following statements is true about artificial selection? A. Breeders can control which animals mate. B. Breeders can control what mutations will appear in the offspring. C. Both A and B are true. D. Neither A nor B is true.

Early taxonomists, like Linnaeus, were interested in creating diagrams to show ... evolutionary relatedness morphological similarity proposed ancestral relationships DNA similiarity

Ben is an entomologist studying ant behavior. He wants to know whether ants are pollinators for a specific plant. In which stage of the plant's life cycle should he check whether a significant number of adult ants are acting as pollinators? A.

Why do living things use enzymes instead of heat as a source of activation energy? A: Adding heat does not affect how chemical reactions take place. B: Adding sufficient heat would harm or kill a living thing.

Which of the following scenarios describes an epistatic gene interaction?

An 1815 volcanic eruption in Indonesia was followed by a three-year famine around the world. How was the volcano linked to the famine? O A. The eruption's ash and gas significantly dimmed the sun. B.

In the general equation of photosynthesis, why is chlorophyll written over the arrow rather than on the left side of the equation'