Most plant productivity in a forest is directly related to the
A) intensity of sunlight reaching the forest floor.
B) unvarying temperatures throughout the year.
C) consistent precipitation in every month of the year.
D) quality of topsoil in the forest.
D
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Where in the Earth's atmosphere are chemicals most likely to be dispersed and present for a long period of time?
A) thermosphere B) mesosphere C) stratosphere D) ozone layer E) troposphere Read the accompanying scenario and answer the following questions. The human body has the capacity to do work or engage in energy each day. Answer the following questions about the energy you have as you run a triathlon.
Karst topography develops in dry climates with very little surface or subsurface water.
Answer the following statement true (T) or false (F)
When Po emits a beta particle, it transforms into a new element. What are the atomic number and atomic mass of this new element?
A) atomic number = 84; atomic mass = 219 B) atomic number = 86; atomic mass = 214 C) atomic number = 85; atomic mass = 218 D) atomic number = 82; atomic mass = 214
Which of the following statements is true of levorotatory compounds?
A) They all rotate plane polarized light in a clockwise direction. B) They all rotate plane polarized light in a counterclockwise direction. C) They all rotate unpolarized light in a clockwise direction. D) They all rotate unpolarized light in a counterclockwise direction.