The fact that the earth does not go up in flames
in spite of the richness of oxygen in our
environment is related to which of the
following concepts?
a. the activation energy needed to break
bonds.
b. the fact that reactants always have less
energy than products.
c. the first law of thermodynmics.
d. the second law of thermodynamics.
e. the abundance of water in our atmosphere
which inhibits combustion
A
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Which of the following prevents muscle contraction by regulating the interaction between the
myofilaments? a. the troponin-tropomyosin complex b. actin c. actomyosin d. phosphate e. myosin
The actinoplanetes can be found in ________ habitats.
A. freshwater B. soil C. marine D. All of the choices are correct.
From the time of the industrial revolution until about 50 years ago, the human population growth rate most closely resembles:
A) linear growth. B) fluctuating increases and decreases, with overall slow growth. C) exponential growth. D) variable, unpredictable growth.
The purpose of photolysis is to _______.
a. provide water for the plant b. provide oxygen for the plant c. split carbon dioxide d. provide electrons to replace those lost by photosystem II