Which one of the following viruses is an RNA virus? A: Herpes simplex
C. Bacteriophage
B. HIN1
D. HIV​

Which of the following explains why a tree is often used as a model to represent the principle of common descent

3. in the fruit fly, recessive mutation brown, b, causes brown color of the eye and absence of red pigment. recessive mutation p of another independent gene causes purple color of the eye and absence of brown pigment. the cross of a brown-eyed female and purple-eyed male produced wild type eyes. what will be the colors and their ratio in f2?

Mulitple choice which of the following is a function of the nucleus? a. stores dna b. stores sugars c. builds proteins d. packages proteins