Q: If environmental conditions deteriorate, many species can form protective what? Choices: - fibers - proteins - shells - cysts A:
cysts

Q: The third line of defense of the immune system is called? Choices: - the sudden response - the asymptomatic response - the malignant response - the immune response A:
the immune response

Q: Q: What hypothesis states that the biosphere is its own living organism Choices: - the seager hypothesis - Big Bang theory - small world theory - the gaia hypothesis A:
A: the gaia hypothesis

Question: Q: What are the ionic compounds that produce negative hydroxide ions when dissolved in water? Choices: - isotopes - acids - enzymes - bases A:
Answer: bases

*Question*
Q: Water and many metals are materials that have low resistance to electric currents and are therefore known as what? Choices: - radioactive - good insulators - electromagnets - electric conductors A:
**Answer**
electric conductors

*Question*
Q: An example of hydrolysis working within our bodies is the process of what? Choices: - breathing - absorption - filtration - digestion A:
**Answer**
digestion