Approximately how long have there been autotrophic producers on Earth?
A) 1 million years
B) 2 million years
C) 1 billion years
D) 2 billion years
E) 3.7 billion years
Correct Answer:
Verified
Q20: Biodiversity consists of
A)the variety of the Earth's
Q21: Approximately how long has there been life
Q22: Specialist species
A) are very adaptable
B) tolerate a
Q22: A 2,000 acre coniferous forest in British
Q26: Which of the following organisms would best
Q27: Which of the following is an essential
Q28: If a catastrophic disease that afflicts one
Q29: A 2,000 acre coniferous forest in British
Q30: Geographic isolation may result from
A) a volcanic
Q30: Which of the following statements is false?
A)Genetic
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