This event took place approximately 13.7 billion years ago
A) Formation of the Earth
B) The first volcanoes
C) The big bang
D) Formation of the solar system
E) Formation of our Sun
Answer: C
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Selective breeding is a method of artificial selection.
Answer the following statement true (T) or false (F)
Ecological services provided by forests typically
A. destabilize climate change. B. are an infinite supply of ecological income. C. are not essential for humans and their economies. D. are worth hundreds of times less than their economic value. E. are worth hundreds of times more than their economic value.
Which of the following do plants need to live?
A. oxygen B. carbon dioxide C. water D. All of these are correct.
Which type of sediment is of organic origin, that is, made by organisms?
A) terrigenous sediments B) biogenous sediments C) hydrogenous (or authigenic) sediments D) cosmogenous sediments