Q: The majority of salamanders lack what organs, so respiration occurs through the skin or through external gills? Choices: - throats - mouths - noses - lungs A:
lungs

Q: If a machine only changes the direction of a force without changing the ratio of the output/input forces, then what is its associated mechanical advantage? Choices: - 4 - 1.5 - 2 - 1 A:
1

Q: Q: While smooth muscle tissue can regenerate from stem cells called pericytes, dead cardiac muscle tissue is replaced by what type of tissue? Choices: - Maximum - embryo tissue - neon tissue - scar tissue A:
A: scar tissue

Question: Q: What type of mammal gives birth to young that need to develop further in the mother's pouch after birth? Choices: - humans - whales - aborigines - marsupials A:
Answer: marsupials

*Question*
Q: What are some uses of chlorine gas? Choices: - washing hands - fueling airplanes - rooting plant cuttings - cleaning, disinfecting and in swimming pools A:
**Answer**
cleaning, disinfecting and in swimming pools

*Question*
Q: What are two examples of lipids? Choices: - vitamins and fatty acid - adipose tissue and olive oil - defects and oils - fats and oils A:
**Answer**
fats and oils