Q: What gems are created by mollusks, such as oysters? Choices: - crystals - turquoise - diamonds - pearls A:
pearls

Q: Root systems are mainly of two types. dicots have a tap root system, while monocots have a what? Choices: - long root system - runner root system - attaching root system - fibrous root system A:
fibrous root system

Q: What are the structural and functional units of the nervous system, which transmit nerve impulses to other cells? Choices: - axions - ions - electrons - neurons A:
neurons