The planets Mercury, Venus, Earth, and Mars, are called terrestrial because they have a compact, rocky surface like Earth's terra firma. The terrestrial planets are the four innermost planets in the solar system. ... Without life, most of the oxygen would soon become part of the compounds on the planet's surface.
<span>A: The proportions of a population that are at different age levels make up the population’s age structure. </span>
Answer:
Polygenic traits are controlled by a number of separate genes.
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Photosinthesis is where plants get their sunlight energy
Answer:
Actually, D is the correct answer
