13. Which of the following are examples of complementary bases? A. cytosine and guanine
B. guanine and thymine
C. thymine and cytosine
D. cytosine and adenine

14. Guanine and cytosine are held together by what type of bonds?
A. ionic bonds
B. peptide bonds
C. covalent bonds
D. hydrogen bonds
DNA molecule is T-A-G-T-C-A. what is

Which statement best describes the nature of science? a. science discoveries using the latest technology are the most valuable. b. scientific theories and laws are based on beliefs and popular opinion. c. scientific ideas change over time as new information is discovered. d. science is superior to other fields such as art, philosophy, and music. i think its c

This is a typical grassland food web. it is also a small picture of an important cycle on earth: the carbon cycle. describe how the carbon gets into this food web. a) bacteria and fungi, the decomposers, recycle carbon from dead organisms. b) carbon is found in the grass and is passed from one level to the next in this food web. eliminate c) all living things give off carbon dioxide as a by-product of respiration and it is released into the atmosphere. d) plants use carbon dioxide as a reactant in photosynthesis, to make usable chemical energy in the form of a sugar.

The basic kind of life cycle found in the simplest animals is: haplontic or diplontic