Potassium has a major role in:

Potassium has a major role in:
 
  A) meiosis. B) cell elongation.
  C) cell division. D) stomate opening and closing.

Question 2

In the nitrogen cycle, atmospheric N is fixed by what 2 methods?
 
  A) plants and soil B) Rhizobium and lightning
  C) mammals and fungi D) fish and birds

Question 3

Ions moving into the plant move by ________ movement before they have to enter the plasma membrane and by ________ movement through the membrane.
 
  A) inplasm, explasma B) symplastic, apoplastic
  C) explasma, inplasma D) apoplastic, symplastic

Question 4

Recycling in ecosystems is mainly carried out by:
 
  A) small animals feeding on plants. B) saprophytes and detritivores.
  C) large animals feeding on small animals. D) mycorrhiza.

Question 5

What characteristic allows water to absorb a large amount of heat without a large increase in temperature?
 
  A) strong surface tension B) high specific heat
  C) weak surface tension D) low specific heat

Question 6

Hygroscopic water in the soil:
 
  A) is tightly absorbed to the soil particle. B) is held in the soil's crystalline structure.
  C) is the first water the plant will take up. D) drains out of the soil from gravitational pull.