Q: What helps form the walls of internal organs such as the heart and stomach? Choices: - blood - tissues - valves - muscles A:
muscles

Q: What term describes all but the sex chromosomes? Choices: - lysosomes - telomeres - sporozoans - autsomes A:
autsomes

Q: Q: In the humoral response, what protein substances help neutralize or eliminate toxins and pathogens in the blood and lymph? Choices: - platelets - membranes - parasites - antibodies A:
A: antibodies

Question: Q: What is greatest source of hazardous waste? Choices: - study - water - heat - industry A:
Answer: industry

*Question*
Q: What word describes a change in behavior that occurs as a result of experience? Choices: - taking - heredity - applying - learning A:
**Answer**
learning

*Question*
Q: The quarks in a particle are confined, meaning individual quarks cannot be what? Choices: - separated - changed - hypothesized - directly observed A:
**Answer**
directly observed