All the following are adaptations of reptiles both on land and in the ocean except:
a. improved circulatory system over the fishes.
b. very efficient kidneys.
c. scale-covered skin without glands.
d. dark bodies.
D
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Creighton and McClintock worked with _______ and their model system to show that homologous chromosomes physically exchange genetic information during crossing over
A. fruit flies B. peas C. corn D. tobacco
A key adhesion molecule is ________, which decreases cell adherence when present in insufficient quantities.
Fill in the blank(s) with the appropriate word(s).
Polyandry is the mating system in which ____
a. one male and one female form a long-term association b. both males and females mate with multiple partners c. one male mates with many females d. one female mates with many males e. both males and females provide care to offspring
The final three-dimensional shape of a single polypeptide is called its ________ structure.
A. primary B. secondary C. tertiary D. quaternary