What evidence do we have that DNA exists?

Hunter is making a list of physical and chemical properties. Which choice should he not list as a chemical property? A) density B) flammability C) radioactivity D) toxicity Eliminate

What is the difference between the photic zone and the aphotic zone in an aquatic biome? A. The aphotic zone receives sunlight, but the photic zone does not. B. The photic zone contains living organisms, but the aphotic zone does not. C.

Do ClownFish get along with, other fish, sharks, sea turtles and pelicans?

Jake fell while hiking and sustained a deep cut on his right calf. Which of the following foods will supply the structural component needed for tissue repair?

Describe an important difference between an artificial ecosystem and a natural ecosystem

Which type of cytoskeletal element is described as a solid

Energy related usage in the United States makes up nearly what percentage of human-caused greenhouse emissions? A 57% B 63% C 72% D 85%

One function of the chromosomes in a cell is to A. absorb light and create energy for the entire organism. B. transport proteins throughout the cell and to other cells in the body. C. provide a location for protein synthesis inside the cell. D.

Consider the Ras signal-transduction pathway. Suppose a mutation occurred in the gene that encodes the transmembrane receptor to which a growth factor binds. The mutation no longer allows the growth factor to bind to the receptor.

Which of these have prokaryotic cells? A. snails B. bacteria C. frogs D. food