Two bird species overlap in a hybrid zone. They are isolated by a slight difference in the male songs and by the females' tendency to select males with the "correct" song. Hybrid offspring tend to have reduced fertility compared to either of the parent
species. What effect might natural selection have in this situation?
A) Natural selection might favor males with less distinctive calls and/or females that are less "choosy."
B) Natural selection might favor males with more distinctive calls and/or females that are more "choosy." As a result, the reproductive barrier between the two species could be reinforced.
C) Natural selection could lead to the hybrid species taking over and eliminating the weaker parent species.
D) Natural selection could lead to the stronger of the two species taking over and eliminating the other species.
Answer: B
You might also like to view...
If a disorder is ___________, then neither parent has to have the disorder, they just have to carry it.
Fill in the blank(s) with the appropriate word(s).
DNA that contains "foreign" genes from another organism
A. is called RNA. B. is called recombinant DNA. C. has experienced a point mutation. D. can no longer function as a genetic blueprint.
While looking in a tide pool, you find an animal with a two-part shell and a large foot that it uses to bury itself in the sand. What is the likely identity of your find?
A. A gastropod B. A chiton C. A bivalve D. A cephalopod E. A snail
Both respiration and photosynthesis use water molecules for the donation of hydrogen ions
Indicate whether the statement is true or false