Darwin observed that tortoises of the nearby islands, although slightly different, belonged to the same species. How might he have known they were the same species?
A) He probably compared DNA sequence data from the different tortoises.
B) He probably compared the metabolism of the different tortoises and observed similar enzymes.
C) He may have heard that tortoises of different islands could mate with each other.
D) He may have moved one group of tortoises to a new island to observe accumulated changes.
C
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In analyzing the number of different bases in a DNA sample, which result would be consistent with the base-pairing rules?
A) A = G B) A + G = C + T C) A + T = G + T D) A = C E) G = T
A living organism must maintain each internal condition (e.g., body temperature) to a fixed set point
Indicate whether the statement is true or false
You find a strange infection in your mouth and visit your dentist. The dentist said the new organism was prokaryotic because it had ________
A) circular DNA B) DNA in the nucleus C) relatively large cells D) membrane-bound organelles
Five hundred forty-one people per thousand die of this disease. This is a statement about
A. an extrinsic limiting factor. B. environmental resistance. C. mortality. D. All of these answers are correct.