Q: What have approximately the same mass as protons but no charge? Choices: - atoms - reactions - electrons - neutrons A:
neutrons

Q: What is the name for unsaturated hydrocarbons that contain at least one double bond? Choices: - lipids - acids - enzymes - alkenes A:
alkenes

Q: Q: The nephron is the functional unit of what pair of organs? Choices: - lungs - eyes - ribs - kidneys A:
A: kidneys

Question: Q: The first plants probably evolved from what? Choices: - dry green algae - moss - mould - aquatic green algae A:
Answer: aquatic green algae

*Question*
Q: What is an important level of organization in ecology and the unit of microevolution? Choices: - macro - system - organization - population A:
**Answer**
population

(Question)
Q: Name the type of system that a jellyfish does not have? Choices: - nervous - reproductive - hereditary - circulatory A:
(Answer)
circulatory