Which of the following was NOT part of the Earth’s primitive atmosphere?
a. oxygen
b. nitrogen
c. hydrogen
d. water vapor
e. inert gases
ANSWER: a
You might also like to view...
Organisms categorized as osmoconformers are most likely _____
A) found in freshwater lakes and streams B) marine C) amphibious D) found in arid terrestrial environments E) found in terrestrial environments with adequate moisture
A paleontologist estimates that when a particular rock formed, it contained 12 mg of the radioactive
isotope potassium-40, which has a half-life of 1.3 billion years. The rock now contains 3 mg of the isotope. About how old is the rock?
a. 2.6 billion years b. 5.2 billion years c. 1.3 billion years d. 0.3 billion years e. 0.4 billion years
Don’t be alarmed, but you should be aware that right now, there is a species of mites, Demodex folliculorum, living in your eyelashes that are adapted to live on human skin and in human hair follicles, and nowhere else in nature. The good news is that these almost never cause any problems for their human hosts, and most are never even aware that they exist. What type of relationship do your eyelash mites share with you?
a. competitive b. mutualistic c. commensal d. parasitic
What are the fundamental resources required to support life?
A) Nutrients, oxygen, sugar, appropriate temperatures B) Oxygen, carbon, nitrogen, water C) Water, nutrients, energy, appropriate temperatures D) Water, energy, oxygen, nutrients E) Oxygen, water, energy, carbon