The total number of cataloged species on Earth in both marine and terrestrial environments is currently 1.8 ________

A) thousand
B) million
C) billion
D) trillion
E) quadrillion


B

Environmental & Atmospheric Sciences

You might also like to view...

What created the Dust Bowl?

A. Intense land cultivation B. Both a drought and intense land cultivation C. The drying up of the Ogallala Aquifer D. A large, engineered water diversion E. A drought

Environmental & Atmospheric Sciences

For the following balanced reaction, which of the following is a solid? 2 Na(l) + Cl2(g) ? 2 NaCl(s)

A. Cl2 B. NaCl C. Cl D. Na E. 2 Na

Environmental & Atmospheric Sciences

What are some of the questions focused by geologists?

a. The formation and composition of our planet b. The causes of earthquakes and ice ages c. The evolution of life d. Protection of water resources e. Exploration of oil and ores d. Environmental remediation f. All of the above

Environmental & Atmospheric Sciences

The earth has sustained life for ____ years.

A. 1.5 million B. 3.8 million C. 1.5 billion D. 3.8 billion E. 1.5 trillion

Environmental & Atmospheric Sciences