Q: What is considered to be a unique feature of echinoderms? Choices: - oil vascular system - air vascular system - iron vascular system - water vascular system A:
water vascular system

Q: The cycle of copper reacting is a good example of what principle? Choices: - law of inertia - conservation of energy - conservation of momentum - conservation of mass A:
conservation of mass

Q: Like a blanket on a sleeping person, greenhouse gases act as what for the planet? Choices: - ventilation - plastic - Exterior Coverings - insulation A:
insulation

Q: Androgen secretion and sperm production are both controlled by hypothalamic and which other hormones? Choices: - Testes - salivary - adrenal - pituitary A:
pituitary