Primary plant/tree growth is characterized mainly by ________
A) seed germination
B) development of leaves that are essential to photosynthesis
C) upward and downward growth due to cell division at tips of roots and shoots
D) change in diameter of the stem/trunk
E) growth and production of wood
C
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Acids, salts, and metals are examples of
a. oxygen-demanding wastes b. organic plant nutrients c. inorganic plant nutrients d. inorganic chemicals e. sediment
Atmospheric nitrogen is converted to nitrogen oxides ________
A) when fuels are burned at high combustion temperatures B) in a photochemical reaction with ozone C) by using catalytic converters on automobiles D) when fertilizers containing nitrogen are applied to farm fields
Evidence for the nebular hypothesis includes which of the following?
A. All of the answers listed here. B. The heavily cratered surfaces we see on some planets and moons, which indicates a period of intense bombardment associated with accretion. C. Radiometric dating has shown that the Earth, Moon, and asteroids all solidified at approximately the same time. D. Visual evidence from Hubble shows that new stars are forming in other parts of the universe. E. Visual evidence from Hubble shows that accretion and planetary development is occurring in other parts of the universe.
A leaching field is the area around a landfill into which leachate percolates.
Answer the following statement true (T) or false (F)