The number of species of organisms on Earth is estimated to range between
A) 300 and 3,000.
B) 300,000 and 3 million.
C) 3 million and 30 million.
D) 3 billion and 30 billion.
Correct Answer:
Verified
Q6: Human developments like housing, shopping centers, or
Q7: More than half of the presently identified
Q8: Attacked by chestnut blight, the American chestnut
Q9: Biologists have spent the past 200 years
Q10: Nonhuman species are
A) relatively expendable since other
Q12: Functioning ecosystems provide a variety of benefits
Q13: It is estimated that as many as
Q14: The behavior of _ most closely resembles
Q15: How many previous, well-documented mass extinctions have
Q16: The biggest threat to biodiversity is
A) habitat
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