Which characteristic is necessary for natural

selection to occur in a species?

(1) stability

(2) variation

(3) complex cellular organization

(4) a very low mutation rate

How would you make 1 Liter of a 1 M solution of CaCl2 (molecular weight = 111 g) ?

Fluid and small particles that leave the blood are collectively called?

What advantages of being an invertebrate over a vertebrate?

Which best describes how enzymes function in the body? A.) Enzymes are converted into products by the reactions they catalyze B.) Enzymes lower the activation energy of reactions C.) On enzyme can catalyze many different reactions D.

Which careers could be touched by biology? Select all that apply. ~apple grower ~pediatrician ~physical therapist ~landscape gardener

What allows otters to live in large groups

The chemoreceptors of the tongue respond to monosaccharides (sugars), metal ions (salty tastes), alkaloids, and acids. which type of receptor do you think is the most sensitive? why?

Explain why controlling the proteins in an organism controls the organisms characteristics

Which statement is false concerning lactic acid? a. It is formed during fast glycolysis b. It is formed when hydrogens combine temporarily with pyruvate c. It can diffuse into the blood and be carried away from the site of production d.

Imagine that you are observing an enzyme-catalyzed reaction in the lab. Every time you add more enzyme, the reaction rate increases proportionally until the reaction rate suddenly levels off.