Describe two differences between b cells and t cells.

Charles darwin hypothesized that bipedalism arose so that hominins would have two free hands to create and carry weapons. what does fossil evidence that now refutes this hypothesis include?

Where does air condtioning take place in respiratory system?

Which question can be answered by science? A. Should the government be regulating the materials that can be used to make grocery bags? B. When will a material that is safe for use in making grocery bags be invented? C.

A relationship where one organism lives in or on another organism for the purpose of getting energy

Why do different people's taste buds like different foods and flavors?

Can gel electrophoresis sort other types of molecules other than DNA

Which of these is an example of an extinction that has been witnessed by humans?

What is the region within a dividing cell where chromatids and homologous chromosomes align in both mitosis and meiosis

A judgment formed, based on the data gathered in an experiment is an?

You are in a desert on a hot day and see water in the distance. It's not really there, but results from refraction of light.