Answer:
D- Topsoil, Subsoil, and Parent Soil
I believe the ratio of C to H to O in simple sugars or monosaccharides are 1 C : 2 H : 1 O or 1:2:1.
Common colds are caused by viruses and antibiotics only work in bacteria. Antibiotics work by targeting the different replication processes and functional characteristics of bacteria. Virus on the other hand are only active once they have invaded something to use as a host. Therefore it is more difficult to target the mechanisms of viruses because they are usually dormant and have different organelles than of bacteria.
The answer is C. a double helix
A cell's relatively constant internal physical and chemical conditions are called homeostasis. This will make the correct answer B.
