The oldest known plant is called King's holly. Why is it sterile?
a. It has lost the female reproductive structures
b. It has no pollinator.
c. It has three sets of chromosomes.
d. It has lost the male reproductive structures.
e. It has too many of the male and female reproductive structures.
c
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Which process would be considered a biorhythm?
a. eating at preset times throughout the day b. feeling sleepy right after you eat a big meal c. seasonal depression manifesting every winter d. removing your hand rapidly from a hot stove e. a gestation period of approximately 40 weeks
The genomes of closely related species are more similar than distantly related species because _____
a. the less time since the species diverged, the more lethal DNA mutations will accumulate b. the more time since the species diverged, the more neutral DNA mutations will accumulate c. the less time since the species diverged, the more neutral DNA mutations will accumulate d. the more time since the species converged, the fewer adaptive DNA mutations will accumulate e. all organisms will accumulate lethal DNA mutations at the same rate
The interaction of two or more polypeptide chains in a hemoglobin molecule is its ____ structure
a. primary b. secondary c. tertiary d. quaternary e. combined
Which of the following is not a function of the liver in adults?
A) produces bile B) detoxifies alcohol C) stores glucose D) produces urea E) makes red blood cells