Q: Pigments are substances that absorb what? Choices: - synthetic light - artificial light - natural light - visible light A:
visible light

Q: The lighter photic zone and darker aphotic zone are determined by what? Choices: - water reflection - water shape - water density - water depth A:
water depth

Q: Q: What happens to a substance in a liquid state when the temperate is lowed? Choices: - it melts - it evaporates - it dissipates - it solidifies A:
A: it solidifies

Question: Q: What is vital for nervous system functions that include muscle stimulation, memory formation, and learning? Choices: - thiamine - glutamate - glycogen - acetylcholine A:
Answer: acetylcholine

*Question*
Q: The ends of linear chromosomes are maintained by the action of which enzyme? Choices: - cytokine - pepsin - insulin - telomerase A:
**Answer**
telomerase

*Question*
Q: What do optical fibres look like? Choices: - square boxes - big flashlights - flat paper - thin glass tubes A:
**Answer**
thin glass tubes