When natural selection tends to split a population into two phenotypic groups, it is called
A) balanced polymorphism.
B) stabilizing selection.
C) coevolution.
D) gene flow.
E) genetic drift.
A
You might also like to view...
Which of the following protist lineages is appropriately paired with its supportive and/or protective structure?
A) Diatoms have an intricate, chalky, chambered calcium carbonate shell. B) Parabasalids have an internal support rod, made of cross-linked microtubules, that runs the length of the cell. C) Alveolates have tough plates in the cell wall that are made up of cellulose. D) Euglenoids cover themselves with tiny pebbles. E) Dinoflagellates are surrounded by a glass-like, silicone dioxide cell wall.
What is the ultimate cause of death from
Duchenne muscular dystrophy?
a. The cardiac muscles fail. b. The brain tissue degenerates. c. The liver fails. d. The respiratory muscles fail. e. The kidneys fail.
As the ciliary muscle relaxes, the suspensory ligaments tighten and stretch the lens, allowing for distance vision
Answer the following statement(s) true (T) or false (F)
Why is Taq polymerase used in a polymerase chain reaction (PCR)?
A. Taq polymerase is more efficient than other DNA polymerases. B. Unlike other DNA polymerases, Taq polymerase is heat stable and survives the 94 degree denaturation step in PCR. C. Taq polymerase can produce DNA from an RNA template, unlike other DNA polymerases. D. Unlike other DNA polymerases, Taq polymerase is not inhibited by dideoxy nucleotides. E. Taq polymerase has proofreading activity and thus makes fewer errors than other DNA polymerases.