A group is considered monophyletic if
A. it is the most parsimonious grouping.
B. the group does not contain the most recent common ancestor.
C. not all descendants of the common ancestor are included.
D. all members of the group share a common ancestor that is included in the group.
E. all members share homoplastic traits.
Answer: D
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Use the following study to answer the following question(s): A current trend among professional baseball players is to wear braided titanium necklaces. The titanium reportedly regulates the flow of energy through the body. The player wearing the necklace then shows improved strength, tires less, and recovers more quickly.If you were to evaluate these claims using the scientific method, what would be the first step?
A. Gather testimonials. B. Evaluate the results. C. Develop a hypothesis. D. Conduct an experiment.
A person with carbohydrates A and B on the surface of their red blood cells will have which of the following blood types?
A. Blood type A, as A is dominant over B B. Blood type O, as A and B cancel each other out C. Blood type B, as B is dominant over A D. Blood type AB, as both A and B are present
Each of the following statements concerning the gram-positive cell wall is true EXCEPT
A) it maintains the shape of the cell. B) it is sensitive to lysozyme. C) it protects the cell in a hypertonic environment. D) it contains teichoic acids. E) it is sensitive to penicillin.
The complementary base pairs in a DNA molecule are stabilized by:
A) ionic bonds. B) a salt bridge. C) hydrogen bonds. D) covalent bonds. E) the electrostatic interactions of the charged backbone