Answer:
Viroids
Explanation:
Viroids are an infectious entity affecting plants, smaller than a virus and consisting only of nucleic acid without a protein coat.
Answer:
Surface water is a key component to the hydrologic cycle. Surface water is any body of water above ground, including streams, rivers, lakes, wetlands, reservoirs, and creeks. ... Water that seeps deep into the ground is called groundwater. Surface water and groundwater are reservoirs that can feed into each other.
Natural disaster e.g. Global warming
Answer:
The fossils in layer 4 is much older than the fossils in layer 1
Answer:
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