Polyunsaturated fats ____.
A. have fewer hydrogen atoms than do saturated fats
B. are more characteristic of animal fats than plant fats
C. have no double bonds
D. are solid at room temperature
E. are gas at room temperature
Answer: A
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What mechanism is not used to prevent self-pollination in angiosperms?
a. separate male and female individuals b. pollen is shed before the stigma of that flower is receptive to pollen c. pollen is shed after the stigma of that flower is receptive to pollen d. self-incompatibility genes enable a plant to recognize its own pollen e. self-incompatibility genes stimulate growth of the pollen tube
The first function of feathers was most likely:a
as protection from predators. b. to insulate. c. to communicate with rivals.
d. as color displays in courtship rituals. e. as protection from parasites.
Which of the following is the subdiscipline of biology concerned with the study of heredity and variation at the molecular, cellular, developmental, organismal, and populational levels?
A) cytogenetics B) molecular biology C) biochemistry D) cell biology E) genetics
The presence of a buffer in our blood helps maintain homeostasis.
Answer the following statement true (T) or false (F)