Which vertebrates rely on a positive pressure filling mechanism to move air into their lungs?
A. human
B. eagle
C. bullfrog
D. crocodile
E. mouse
C. bullfrog
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______ are the only vertebrates in which blood flows directly from respiratory organs to body tissues without first returning to the heart.
A. Amphibians B. Birds C. Fishes D. Mammals E. Reptiles
Buds are produced
a. in the axils of leaves. b. at the very ends of stems. c. at the nodes. d. by the apical meristem. e. at all of these areas
Which of the following enzymes digests fats?
a. aminopeptidase b. disaccharidases c. amylase d. lipase e. trypsin
The columns in Figure 15-3 represent F (for female), C (for children), and M (for male). The presence of the band marked with arrow #2, shows that:
a. this DNA sequence in the children is a mutation.
b. this DNA sequence in the children is inherited from their mother.
c. this DNA sequence in the children is inherited from their father.
d. this sequence in the children is inherited from both their mother and father.
e. individual F is not the mother of these children.