Lake Victoria is famous for its variety of cichlid fishes. In fact, they offer the most diverse assembly of vertebrates presently known to science. One trait that scientists have focused on as one possible reason for their adaptability is
A. a second set of scales that lie beneath the top outermost scales.
B. gill arches that are not covered by an operculum, which prevents hiding places for gill parasites.
C. digestive tracts that are able to process most substrates, which has eliminated the need for feeding specialization.
D. ability to change color in relationship to their environment.
E. a second set of jaws in their throats.
Answer: E
You might also like to view...
Mutations are permanent changes in a cell's DNA base sequence. They typically have negative consequences, but they are also the original source of genetic variation and the raw material of evolution. How can mutations accumulate, given that cells have repair systems that fix changes or breaks in DNA strands?
What will be an ideal response?
The observation by Masui that cytoplasm from a mature egg injected into an immature oocyte stimulated meiosis led to the identification of ________
Fill in the blank with correct word.
Shingles, or herpes zoster, is a reactivation of the virus that causes
A) smallpox. B) German measles. C) measles. D) whitlows. E) chickenpox.
At the rainy equator, you will most likely find ___________, whereas at 30 degrees north and south, where it is drier, you will find ___________.
Fill in the blank(s) with correct word.