As the earth has active tectonics we know that rocks are recycled and the oldest rocks may therefore just be the oldest rocks that have not been recycled yet. We know the true age of the earth by looking at radioactive isotopes of things like spacedust and meteors that formed at the same time as the earth as they have not been affected by the tectonic process of recycling here on Earth.
Answer:
Plants have evolved several adaptations to life on land, including embryo retention, a cuticle, stomata, and vascular tissue.
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Genes are the segments of DNA transferred from parents to offspring
Explanation:
The gap between the two neurons is known as a synapse.
