for the following structural characteristic, decide if it is a characteristic of dna, a characteristic of rna, a characteristic of both dna and rna, or a characteristic of neither dna nor rna. it contains a phosphate group for every other nucleotide.
a. dna
b. rna
c. both dna and rna
!
d. neither dna nor rna

What is histamine and what is its role in allergic reactions

Here's one way to follow the scientific method. place the missing steps in the correct position in the process.

Consider darwin's first writings on the theory of natural selection. an important point of darwin's essay on the principle of population, written in 1798, was a peer's observation that in nature plants and animals produce far more offspring than can survive, this observation can be attributed to a) charles lyell. b) thomas malthus. c) jean-baptiste lamarck. d) johann friedrich meckel.