Which of the following is NOT a characteristic of saturated fats?
A) They are usually solid at room temperature.
B) They contain at least one double bond.
C) They are found in animals.
D) Their fatty acids pack tightly together.
E) They are a form of stored energy.
B
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Indicate whether the statement is true or false.
Lignin is to cellulose strands as ____ is to
epidermal cells. a. cuticulin b. epidermerin c. pectin d. cutin e. chitin
A loud sound can be distinguished from a soft
whisper because a. more neurons depolarize. b. each receptor depolarizes more fully. c. the frequency of neuron depolarization increases. d. more neurons depolarize, and the frequency of neuron depolarization increases. e. more neurons depolarize, each receptor depolarizes more fully, and the frequency of neuron depolarization increases.
"Vertebrates" refers to animals that possess
a. hair. b. mammary glands. c. the ability to give birth to live young. d. lungs. e. a backbone.