1. If a DNA strand has 33 % cytosine what percent will be adenine? 64 %
32 %
17 %
36 %

2. Which of the following combinations is true of the nucleotide composition of a sample of DNA?
A = C
A = G AND C = T
A + C = G + T
G + C = T + A

How do you know? Imagine guanine is 30% of the DNA sample. In your notebook, revise the mathematical model you chose in your answer now that you have this information.

Which of the following is true of microbes? a. ninety-nine percent of all microbes are pathogenic. b. gene expression in bacteria is very similar to gene expression in humans, which facilitates the use of bacteria in recombinant biotechnology and gene therapy. c. all bacterial enzymes are harmful to humans and the environment. d. microbes create pollutants and toxins that harm the environment.

Match the order of the levels of organization in nature with the correct description. example: atoms are fundamental units of matter= level 1levels- 2,3,4,5,6,7,8.now what levels are these? population consists of organismscells consist of moleculesecosystems consist of communities interacting with there environmentmolecules consist of atomsthe biosphere consist of all ecosystems on earthcommunities consists of populationorganisms consist of cells

Which of these structures are found in both plant ans animal cells?