Q: What occurs when nature reclaims areas formerly occupied by life? Choices: - typical succession - tertiary succession - primary succession - secondary succession A:
secondary succession

Q: What is often the cause of phenotypic differences between identical twins? Choices: - natural selection - genetics - learned behavior - environment A:
environment

Q: Q: What two substances do plants give off when they make food? Choices: - water and oil - carbon dioxide and oxygen - chlorophyll and nitrogen - oxygen and water A:
A: oxygen and water

Question: Q: Birds are thought to have evolved around 150 million years ago from what? Choices: - teradactils - raptor dinosaurs - parrot dinosaurs - theropod dinosaurs A:
Answer: theropod dinosaurs

*Question*
Q: What are needed to oxidize the noble gases to form compounds in positive oxidation states? Choices: - metal oxidants - protein oxidants - bacteria oxidants - potent oxidants A:
**Answer**
potent oxidants

(Q).
Q: Because of their reactivity, we do not find most representative metals as free elements where? Choices: - in water - in the atomospher - underground - in nature A:
(A).
in nature