Birds, snakes, lizards, turtles, and crocodiles are all thought to share a common ancestor and several homologous traits. Assuming that this is true, these groups of animals and their common ancestor would represent
A. an outgroup.
B. a monophyletic group.
C. homoplastic convergence.
D. a polyphyletic group.
E. a species cluster.
Answer: B
You might also like to view...
In a cloning experiment, you use a vector that contains a lacZ gene as a selectable marker. If the competent cells are grown on X-Gal and IPTG, which colonies would contain chromosomal DNA?
A. The white colonies B. The blue colonies C. Half the total colonies D. None of the colonies
What is true about the lymphatic system?
A. It exhibits peristaltic contractions. B. Fluid moves through the lymphatic system under high pressure. C. It carries all absorbed materials from the stomach and intestines to the liver. D. It is bi-directional. E. It collects fluid that seeps into the tissues and returns it to the blood.
The adaptive immune response may be described as
all of the following EXCEPT a. specific. b. essential. c. responsive. d. generalized. e. effective.
DNA:a
is composed of nucleotide building blocks. b. contains uracil instead of thymine. c. is single-stranded. d. contains pyrimidines and purines in a 2:1 ratio. e. contains the sugar ribose.