Why is biosynthesis unlikely to occur today as it did in Earth's youth?
a. Living organisms have altered oceanic and atmospheric conditions
b. There is less available oxygen in the atmosphere
c. Ozone is less protective from the sun's influence
d. The ocean’s do not contain enough free iron
ANS: A
Living organisms have altered the ocean and atmosphere, and those changes are not consistent with
any new origin of life. Plants are now producing oxygen which is then added to the atmosphere.
Oxygen, in the form of Ozone, also blocks the most dangerous wavelengths of light from reaching the
surface of the ocean. Additionally, the many tiny organisms present today would gladly scavenge on
any large organic molecules. Information can be found in the section Life Probably Originated in the
Ocean.
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In the diagram below, D is the
A) hadal zone.
B) mesopelagic zone.
C) epipelagic zone.
D) benthic zone.
Why does Europe have a mild climate despite its high latitude?
a. Tilt of Earth b. Global warming c. Warm water that originate in tropical parts of the Atlantic Ocean d. Lack of glaciers e. Large volume of emissions from industrial and manufacturing centers
Describe the processes of denudation
What will be an ideal response?
Greenways are strips of land that
a. connect parks and neighborhoods. b. often run along rivers and streams. c. provide corridors for the movement of wildlife. d. All of the above are correct.