Hemoglobin from two species is compared. On the long protein chains, there are three locations where the amino acids are different. Where would you place the common ancestor of the two species on the "tree of life," and why?

Why is water considered a renewable resource?

Enzymes are important to metabolic reactions of the cell in which of the following ways? a. Enymes allow reactions that could not normally occur. b. Enzymes lower the activation energy needed for the reaction. c.

Which of the following are considered to be long term complications of diabetes mellitus? a. neuropathy b. retinopathy c. nephropathy d. blood vessel damage e. all of the above

Which statements best describe the first stage of cellular respiration? Check all that apply. A) The stage happens in cytoplasm. B) The stage happens in mitochondria. C) Oxygen combines with small molecules. D) Glucose is broken down.

What effects have science and technology had on humans and other organisms?

Which geological era is known as the age of reptiles?

An argument against cost / benefit analysis is that it requires?

Use the drop-down menus to complete the sentences. An iris will bloom during the w months because the nights are A poinsettia will bloom during early w because the nights are

Size, shape, and position of grains that make up a rock

Which of the following statements cannot be tested by science?