The fossil record is used to divide Earth's history into geologic time periods. The figure below shows the four major subdivisions of geologic time—eons, eras, periods, and epochs. Eons are the longest subdivision and are based on the abundance of certain fossils. Eons are divided into smaller time periods called eras
Answer:
A.Oxygen
Explanation:
Trees take in Carbon for photosynthesis and as a waste product air.Animals do the exact opposite for cellular respiration.
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Answer:
Nitrogen fuels are burned at high temperatures
Explanation:
When the nitrogen-based fuel is burned at high temperatures, the nitrogen in the fuel combines with oxygen to form nitrogen oxide. While this can occur n combustion engines in cars, leading to pollution, the same occurs naturally espically during lightning strikes that cause the nitrogen gas in the atmosphere combine with oxygen. NO is an airway irritant.
Answer:
I<em> think</em> it's only one allele is required to express the trait.
Explanation:
