Seven students A, B, C, D, E, F, G stand in a line. A is exactly in the middle. B is to the left of A. C is second to the right of A. D is at the right end. E is between B and A. F is not next to G. Who is at the left end?

Which structure helps bacteria adhere to surfaces?

A is the father of B. C is the daughter of A. D is the brother of E. E is the son of B. F is the mother of D. How is F related to A?

Fossils are best described as:

Which of the following is an example of a codominant trait?

A is B\'s sister. C is B\'s mother. D is C\'s father. How is A related to D?