Q: An allele is an alternative form of what structure? Choices: - amino acid - enzyme - protein - gene A:
gene

Q: The differences in the biomes is due to differences in the what factors? Choices: - biological - temperature - air quality - abiotic A:
abiotic

Q: What do fission reactors use to slow down the neutrons? Choices: - inertia - brake - control - moderator A:
moderator