Placoid scales are found on:
a. fleshy-finned fishes.
b. cartilaginous fishes.
c. ray-finned fishes.
d. lampreys.
e. hagfishes
b
You might also like to view...
Klinefelter syndrome (XXY) can be easily diagnosed by _____
a. pedigree analysis b. aneuploidy c. karyotyping d. phenotypic treatment
In a pedigree chart, a male who does NOT
demonstrate the trait being studied is represented by
a. a darkened square. b. a darkened diamond. c. a clear circle. d. a clear square. e. a darkened circle.
Morphogens are substances that help control development
Indicate whether the statement is true or false
Which one of the following statements most closely agrees with the theory of evolution by means of natural selection, as put forth by Darwin?
a. Only the best-adapted organisms will survive. b. Organisms better adapted to their immediate environment are most likely to survive and reproduce. c. Humans arose from chimpanzees. d. Organisms deliberately evolve the structures they need to survive. e. Organisms mutate under unfavorable conditions to become better adapted.