Answer:
D, they are all the same size.
DNA is composed of nucleotides, which are composed of three parts:
1. A five carbon carbohydrate (pentose)
Pentose is classified as a monosaccharide (simple carbohydrate), and its molecular formula is represented by 
. They are water soluble molecules with sweet taste. Monosaccharides may have from three carbon atoms (trioses) to six (hexoses). In DNA is present pentose (5 carbon atoms)
2. A nitrogenous base
Nitrogenous bases are ring-shaped compounds that contain nitrogen in their molecular structure. They are classified into two groups: purines and pyrimidines
The purine bases are adenine (A) and guanine (G). They are larger and contain more than one ring in their structure,.
The pyrimidines, cytosine (C), uracil (U) and thymine (T), are smaller and composed of a single ring.
3. One or more phosphate groups
A phosphate consists of a trivalent anion that contains one phosphorus atom and four oxygen atoms. Its molecular formula is expressed by 
.
Polygenic traits are those traits that are controlled by more than one gene. Such traits may even be controlled by genes located on entirely different chromosomes. Human height, eye and hair color are examples of polygenic traits. Skin color is another polygenic trait for humans and a variety of other animals
<u>Answer:</u>
Jena is reading about the elevation.
<u>Explanation:</u>
- Elevation is the altitude (height) above the sea level. The Florida being at the height of less than 100 feet is its elevation.
- The major factor that affects the climate of that region is its elevation.as the elevation increases i.e. the height of the place from sea level increases the temperature of that place lowers.
- For every 1 kilometer rise in elevation the temperature decreases by 6.5 degree Celsius. Hence, Jena is concerned about the elevation.
