The archenteron develops into
A) the mesoderm.
B) the blastocoel.
C) the endoderm.
D) the placenta.
E) the lumen of the digestive tract.
Answer: E) the lumen of the digestive tract.
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What is the correct order of geological time frames from oldest to most recent?
a. Permian - Triassic - Jurassic - Tertiary
b. Triassic - Jurassic - Tertiary - Permian.
c. Triassic - Permian - Jurassic - Tertiary.
d. Tertiary - Triassic - Permian - Jurassic.
e. Jurassic - Triassic - Permian - Tertiary
In Figure 16.1, how many mL is the residual volume?
A) 600 B) 1700 C) 2800 D) 2200 E) 1300
Acquired specific immunity involves the response of
A. skin barriers. B. interferon. C. lysozyme. D. B and T lymphocytes. E. mucus membranes.
Balanced polymorphism is a type of
a. disruptive selection. b. sexual selection. c. directional selection. d. stabilizing selection. e. any of these