Q: Q: By breaking down wastes and remains of dead organisms, decomposers perform what function in an ecosystem? Choices: - reproduction - symbiosis - collecting - recycling A:
A: recycling

Q: Q: What is the term for a structure composed of more than one type of tissue? Choices: - marrow - system - cortex - organ A:
A: organ

Q: Q: What is the sum of all biochemical reactions in cells called? Choices: - respiration - diffusion - evolution - metabolism A:
A: metabolism

Q: Q: Bubbles in bread dough are created by what gas produced during alcoholic fermentation? Choices: - acid dioxide - combustion dioxide - yeast dioxide - carbon dioxide A:
A: carbon dioxide