INFER Which of the following statements describes the structure of nucleotides that
make up DNA? Select all correct answers.
a. All nucleotides have the same base.
b. All nucleotides have a phosphate group and deoxyribose.
c. Adenine has one more carbon-nitrogen ring than thymine.
d. Purines have one carbon-nitrogen ring.
e. Pyrimidines have one carbon-nitrogen ring.

b., c., e. are the answers.

Purines have double rings, whereas pyrimidines have single rings.

Explanation:

The Earth has two basic sources of energy - that reaching the Earth from the Sun (Solar Energy) and that reaching the surface of the Earth the Earth itself (Internal or Geothermal Energy). Solar Energy - reaches the Earth in the form of radiant energy, and makes up 99.987% of the energy received by the Earth.These spheres are closely connected. For example, many birds (biosphere) fly through the air (atmosphere), while water (hydrosphere) often flows through the soil (lithosphere). In fact, the spheres are so closely connected that a change in one sphere often results in a change in one or more of the other spheres.Energy can be transferred between the geosphere and the atmosphere by conduction, as Figure 6 shows. When Earth's surface is warmer than the atmosphere, the ground will transfer energy to the atmosphere. When air comes into direct contact with the warm surface of Earth, energy is passed to the atmosphere by conduction.

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