The earth's earliest atmosphere was likely

composed mostly of gaseous
a. hydrogen.
b. nitrogen.
c. water vapor.
d. carbon dioxide.
e. mixtures of these


E

Biology & Microbiology

You might also like to view...

How does the digestion and absorption of fat differ from that of carbohydrates?

A. Processing of fat does not require any digestive enzymes, whereas the processing of carbohydrates does. B. Fat absorption occurs in the stomach, whereas carbohydrates are absorbed from the small intestine. C. Carbohydrates need to be emulsified before they can be digested, whereas fats do not. D. Most absorbed fat enters the lymphatic system, whereas carbohydrates directly enter the blood. E. Fat must be partially digested by bacteria in the large intestine before it can be absorbed, which is not the case for carbohydrates.

Biology & Microbiology

In the tropical latitudes, the length of the dry season increases with distance from the equator

Indicate whether the statement is true or false

Biology & Microbiology

Regarding the mitotic cell cycle, what is meant by a checkpoint?

What will be an ideal response?

Biology & Microbiology

An example of homoplastic structures is the wing of a butterfly and:a

wing of a moth. b. wing of a bird. c. antenna of a moth. d. legs of the butterfly. e. antenna of the butterfly.

Biology & Microbiology