Q: Q: Proteins include 20 common types of what compounds? Choices: - mitochondria - rna acids - dna - amino acids A:
A: amino acids

Q: Q: The mature pollen grain is composed of two cells: the pollen tube cell and which other cell? Choices: - ova - glial cell - photosynthesis cell - generative cell A:
A: generative cell

Q: Q: What occurs when the cartilage at the ends of the bones breaks down? Choices: - stress fracture - rheumatism - osteoporosis - osteoarthritis A:
A: osteoarthritis

Q: Q: Sexual signaling molecules released by fungi are known as what? Choices: - sperm - hormones - vibrations - pheromones A:
A: pheromones