Dna replication involves producing new copies of dna molecules. how many individual dna strands exist after one molecule of dna has been replicated? a. 2 b. 1 c. 4 d. 3

Which describes how weathering and erosion are different? weathering is caused by water. erosion is caused by wind and ice. erosion transports sediments. weathering is a natural process.

What was the land like over 500 million years ago? what was under the sea?

Which of the following statements is accurate about evolution? question 10 options: natural selection only eliminates odd individuals. evolution means that a population never has changes in its genetic frequencies. mutations are always harmful. evolution means that a population undergoes changes in its gene frequencies over time.