Which of the following gases was absent from the atmosphere of the early Earth?

a. carbon dioxide
b. oxygen
c. nitrogen
d. water vapor


b

Biology & Microbiology

You might also like to view...

If the magnification of the two image-forming lenses are both 103, the total magnification of the image will be

(a) 1X. (b) 10X. (c) 100X. (d) 1000X.

Biology & Microbiology

Which of the following is a correct order of arrival in succession?

a. lichens and mosses cottonwood and willow trees Sitka spruce alders b. flowering plants shrubs lichens fir trees c. lichens and mosses alders and hemlock shrubs and grasses Douglas fir d. none of the choices

Biology & Microbiology

Squids are dominant nektonic predators in the open ocean

Indicate whether the statement is true or false

Biology & Microbiology

The __________ is a sedimentary cycle; Earth’s

crust is the largest reservoir, and there is no major gaseous form. Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology