In which of the following are lipids found?
a.
some vitamins and steroids
b.
biological membranes
c.
saturated and unsaturated fats
d.
all of these

Which of the following is an oxidation-reduction reaction? (pictured below)

What are two reasons for why a species might disappear from the fossil record?

Sarah and john are having a discussion on genetic diversity. sarah believes that it happen over a long period of time. john it happens immediately. who is correct? a. sarah is correct because genetic diversity occurs over a long period of time. b. john is correct because genetic diversity occurs immediately. c. both are correct because genetic variation can occur or long period of time. d. neither are correct because genetic diversity occurs over any period of time