Correct: The sun is the center of the solar system. It is mostly gas. It is the most massive object in the solar system.
In terms of macromolecules, needed and utilized by organisms to carry out essential metabolic chemical reactions and for maintaining structure would be Lipids.
Lipid based molecules or Fats tend to store the most energy, as breaking chemical bonds connecting fatty acid chains of long hydrocarbons releases quite a bit of energy.
Answer: Geologists and other Earth scientists use geologic time scales to describe when events happened in the history of Earth. The time scales can be used to show when both geologic events and events affecting plant and animal life occurred. The geologic time scale pictured below (Figure below) illustrates the timing of events like:
Earthquakes.
Volcanic eruptions.
Major erosion.
Meteorites hitting Earth.
The first signs of life forms.
Mass extinctions.
Explanation:
A. xx
b.x+x+
c.x0x0
d.x+x0
e. x0y
