Biology Forums - Study Force

Biomass consists of:
 
  A) living organisms and cells.
  B) dead tissues and wastes.
  C) identifiable biomolecules.
  D) polymerized, non-identifiable molecules.
  E) all of the above

Question 2

Gypsum or nylon blocks are most useful in estimating the soil water content if the soil is quite dry.
 
  Indicate whether the statement is true or false

Question 3

For most soils, plowing and harrowing every year improves soil tilth in the long run.
 
  Indicate whether the statement is true or false

Question 4

To avoid a nitrate depression period when it is added to a garden soil, about how many kg of nitrogen must be added to a load of grass clippings that contains 1000 kg of C and 25 kg of N?
 
  A) 100 B) 15 C) 75 D) 35 E) 50

Question 5

Green plant residues such as grass clippings or a green manure crop generally have a water content of about ________ by weight.
 
  A) 75 B) 10 C) 95 D) 45 E) 25

Question 6

Plant roots are an important source of carbon for many soil organisms which are beneficial to plants.
 
  Indicate whether the statement is true or false

Question 7

The following are characteristics of a water molecule.
 
  A) The H to O to H angle is approximately 90C.
  B) It is held in soils by adhesion but not adsorption.
  C) The two H atoms are on diametrically opposite ends of the molecule.
  D) It has a positive and a negative side.
  E) It is attracted to surfaces with negative but not positive charges.

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Great answers, all of them were right