Which of the following statements are true with respect to enzyme activity?

a) Enzymes speed up the reaction rate.

b) Enzymes are regenerated when the reaction is completed.

c) Enzyme reactivity is not affected by change in pH and temperature.

The acceleration of an object that decreases in speed will be negative. True False

Eukaryotic gene regulation differs from prokaryotic gene regulation in that

There are several mechanisms through which reproductive isolation occurs. Which situation is an example of behavioral isolation? A. Mules, the offspring of a male donkey and a female horse, are unable to reproduce because they are sterile. B.

Compare the processes of mitosis and meiosis by explaining the number of cells formed in each process, Number of chromosomes in the new cells compared with the number of chromosomes in original cells, and the type of cells formed in each process.

What is the main function of the circulatory system in multicellular organisms? A. to bring oxygen into the lung B. to put carbon dioxide into all blood vessels C. to expel waste products from the body D. to transport materials throughout the body

Which of the following could be a method used to estimate the age of an ancient rock? To find out its mineral composition To find the age of the fossils trapped in it To calculate the amount of C-14 atoms left in it To calculate the number of

What happens when a mutation occurs?

What macromolecule is the primary energy source for organisms?

If oil from the Canadian sands is so difficult to extract, why does Conoco Phillips bother?

Give an example of how cells can be specialized