Q: Composed largely of the polysaccharide chitin, the exoskeleton provides an effective barrier defense against most what? Choices: - parasites - white blood cells - vaccines - pathogens A:
pathogens

Q: What third property is different if two boxes have the same volume but one has greater mass? Choices: - oxygen - output - diameter - density A:
density

Q: Q: Where are the two tonsils located? Choices: - sinus - nose - tooth - throat A:
A: throat

Question: Q: In places where crops grow only during part of the year, the land may be bare for a few? Choices: - days - weeks - minutes - months A:
Answer: months

*Question*
Q: What are the three types of symbiotic relationships? Choices: - pledgism, truism, greenism - symbiosis , communalism , parasitism - altruism, conservatism, communalism - mutualism, communalism, parasitism A:
**Answer**
mutualism, communalism, parasitism

(Q).
Q: An example of a variable relating to the ramp is its what? Choices: - color - mass - weight - steepness A:
(A).
steepness