Why does the professor mention the size of the Nightcap Oak population over the last few hundred years？
A. To explain why it is likely that the Nightcap Oak population will increase in the future
B. To point out that the Nightcap Oak"s limited reproductive success has not led to a decrease in its population
C. To present evidence that the Nightcap Oak is able to tolerate major changes in its environment
D. To point out that the Nightcap Oak is able to resist diseases that have destroyed other tree species
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What topics related to the Nightcap Oak does the professor mainly discuss？ Choose 2 answers.
A. Factors that relate to the size of the area in which it grows
B. The size of its population over the last few centuries
C. Whether anything can be done to ensure its survival
D. Why it did not change much over the last one hundred million years
According to the professor, what led scientists to characterize the Nightcap Oak as primitive？
A. It has no evolutionary connection to other trees growing in Australia today.
B. It has an inefficient reproductive system.
C. Its flowers are located at the bases of the leaves.
D. It is similar to some ancient fossils.
What does this practice explain？ Choose 2 answers.
A. Why tulips replaced gold as a form. of currency
B. Why buyers were no longer interested in owning actual tulips
C. Why borrowing in the Netherlands increased on a significant scale
D. Why the middle class in the Netherlands expanded in size
What were some of the factors that contributed to the tulip craze in the Netherlands in the seventeenth century？ Choose 3 answers.
A. Wealthy gardeners liked to compete for rare plants.
B. The number of people with disposable income was growing.
C. Tulip bulbs were initially cheap and easy to obtain.
D. Tulips in the wild bloomed in unusual color combinations.
E. The tulip market was not regulated by the government.
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