Which of the following is true of dna? a. there are six nitrogenous bases involved. b. cytosine can pair with guanine and adenine. c. there are four nitrogenous bases involved. d. adenine always pairs with guanine.

Which of the following is a consequence of urban heat islands? increased precipitation downwind of the city? increased precipitation upwind of the city? decreased winds within the city? increased winds within the city?

The similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between organisms in both locations?

Control of the body is accomplished by which of the following body systems? nervous system and circulatory system endocrine and repertory system circulatory and respiratory systems nervous system and endocrine systems