Question: Q: The secondary wall contains _________ , a secondary cell component in plant cells that have completed cell growth/expansion. Choices: - cytoplasm - glucogen - cellulose - lignin A:
Answer: lignin

Question: Q: What links the trophic levels from producers to top carnivores? Choices: - ecosystems - environments - fuel chains - food chains A:
Answer: food chains

Question: Q: What do light emitters do to what you see? Choices: - divide frequencies - subtract frequencies - block frequencies - add frequencies A:
Answer:
add frequencies