Answer:
the orientation of Earth's tilt with respect to the sun – our source of light and warmth – does change as we orbit the sun. In other words, the Northern Hemisphere is oriented toward the sun for half of the year and away from the sun for the other half.
Explanation:
The answer to your question is A. Higher latitudes receive less radiation due to the curvature of the Earth.
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Answer:
C. Organisms are now divided into three kingdoms.
Explanation:
In the early 1860s, a German scientist named Ernst Haeckel suggested using a three kingdom system of classification. Haeckel's three kingdoms were Animalia, Plantae, and Protista.
Answer:
B 20 amino acids, hundreds of proteins
Explanation:
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