According to the Oparin-Haldane hypothesis, which of the following was probably NOT a major
component of Earth's early atmosphere?
a. O2 (oxygen)
b. H2 (hydrogen)
c. CH4 (methane)
d. H2O (in vapor form)
e. NH3 (ammonia)
A
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Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
What will be an ideal response?
Explain the times, periods, and events that refer to life's evolution leading to human life on Earth
What will be an ideal response?
The first several cleavages after fertilization occur in the
a. uterus. b. ovary. c. vagina. d. oviduct. e. cervix.
Her immune system's recognition of the second infection involves memory _____
A) helper T cells B) natural killer cells C) plasma cells D) cytotoxic T cells