Which of the following is true about DNA? A. Some kind of organism do not have DNA

B. Alleles are two versions of gene

C. One gene can code for several proteins

D. Cells in different tissues or organs contain different DNA

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.

Depending on the organism the number of in a cell may change

What do lava flows made of aa indicate about the type of volcanic eruption that occurred? a. the eruption was viscous. b. the eruption was pyroclastic. c. the eruption was explosive. d. the eruption was quite. !