Answer:
Question 1: C Messenger RNA
Question 2: D GAC CTT GAT
Question 3: B 20 chromosomes
Question 4: C 75% gray, 25% ebony
Question 5: sperm cells
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Explanation:
Narrow.
For a wide ring, it indicates a longer/faster growing season. Narrower ring means there is less growth, which is likely caused by poor growing conditions.
Fracture toughness,Flextural strength, Corrosion Resistance,Thermal properties,Hardness
human cells in research can lead to ethical problems
Looking at the features of past species you can determine how old and what differences they have from fossils.