Which of the following is not a scientific hypothesis for how life began?
a. Outgassing and related volcanic materials brought proto amino acids to the surface of the earth.
b. Methane and hydrogen sulfide from deep-sea hydrothermal vents and hot springs like those at Yellowstone National Park provided the necessary materials.
c. Methane and ammonia in the early atmosphere combined with the help of lightning or ultraviolet light to produce the first amino acids.
d. Asteroids and comets brought amino acids to Earth.
a. Outgassing and related volcanic materials brought proto amino acids to the surface of the earth.
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Which of the following best matches the description?Largest organized demonstration in U.S. history.
A. World Bank B. NGO C. judicial branch D. Environmental Quality Amendment E. command and control F. wise-use G. executive branch H. legislative branch I. policy J. Earth Day
Members of a clade can have different derived and primitive characteristics
a. True b. False
Geoengineering methods to control global warming are criticized because ____.
A. geoengineering projects only affect a local area B. they are vulnerable to cheating C. taxes on energy consumption are not popular D. they are risky and have possible unknown effects E. they don't do enough to cool the earth
Chad's natural vegetation regions from north to south are desert, ________, savanna
A) Sahel B) rainforest C) palm trees D) taiga