Q: The main organs of the cardiovascular system are the blood vessels and what else? Choices: - alveoli - capillaries - lung - heart A:
heart

Q: What organ senses sound? Choices: - teeth - brain - eyes - ear A:
ear

Q: Q: All three axes are established before the zygote begins to undergo what? Choices: - cloning - birth - twinning - cleavage A:
A: cleavage

Question: Q: What is it called when individual organisms work together with one another? Choices: - continuation - competition - dualism - cooperation A:
Answer: cooperation

*Question*
Q: The german physicist max planck (18581947) used the idea that atoms and molecules in a body act like oscillators to absorb and emit this? Choices: - blood - energy - convection - radiation A:
**Answer**
radiation

Q: Because it can be controlled intentionally, skeletal muscle is also called what type of muscle? Choices: - automatic - necessary - involuntary - voluntary A:
voluntary