In early ancestors of the modern giraffe, longer necks allowed animals to reach higher tree branches as food. This would lead to ________ in the ancestral giraffe population.

A. disruptive selection
B. sexual selection
C. directional selection
D. stabilizing selection
E. genetic drift


Answer: C

Biology & Microbiology

You might also like to view...

As compared to F-negative cells, F-positive cells are at a disadvantage because

a. they may "waste" conjugation by conjugating with other F-positive cells. b. they have greater susceptibility to phage infection. c. cell division is prolonged. d. the replication process renders them more susceptible to mutation. e. they have a more fragile cell wall.

Biology & Microbiology

Once the histones are removed from a chromosome in cellular division, one can see DNA spreading out in loops around the supporting protein structure, called the:

A. scaffold. B. 1400-nm chromatin fiber. C. 300-nm chromatin fiber. D. 2-nm chromatin fiber. E. beads on a string.

Biology & Microbiology

A nerve is...

What will be an ideal response?

Biology & Microbiology

A scientist discovers a new microbial species. It is a single-celled eukaryote without cell walls. In which kingdom will it likely be classified?

A. Plantae B. Monera C. Fungi D. Protista E. Animalia

Biology & Microbiology