According to Mora et al., in 2011, the number of estimated species on Earth is …………… .
A. 8.7 million
B. 9.7 million
C. 7.7 million
D. 9.7 billion
Answer:A
According to Mora et al., in 2011, the number of estimated species on Earth is …………… .
A. 8.7 million B. 9.7 million C. 7.7 million D. 9.7 billion