Which one of the following structures is not found in all adult and larval tunicates?
A. gill slits
B. pharynx
C. notochord
D. excurrent siphon
E. incurrent siphon
Answer: C
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Which of the following structures of the eye is matched appropriately with its developmental material?
a. cornea ? ectoderm b. cornea ? crystallin c. lens ? optic cup d. retina ? crystallin e. retina ? ectoderm
The application of scientific knowledge for some specific purpose is known as _____
A) technology B) deductive science C) inductive science D) pure science
Aseptic technique in obtaining clinical specimens is essential to ensure bacterial presence is due only to
a. normal flora. b. infection. c. contamination. d. none of the above.
Which of the following points is not considered part of the process of natural selection?
a. Many adaptive traits may be acquired during an individual's lifetime and passed on to that individual's offspring. b. Many of the variations among individuals in a population are heritable. c. More offspring are produced than are able to survive and reproduce. d. Individuals with traits best adapted to the environment are likely to leave more offspring. e. Unequal reproductive success leads to gradual change in a population.