germination

• what will happen to a seed after dormancy


  it will germiante
• what environmental factors will cause a seed that is dormant to germinate


  when they are favourable and food is mobalised
• what are the three main requirements for successful germination

  oxygen , suitable temperature and water
• why is oxygen needed for a successful germination

  for aerobic respiration to produce ATP
• why is a suitable temperature needed for germination

  for the enzymes involved in germination
• why is water needed for germiantion

  to mobilise enzymes ,and to make cells turgid
• what is the first stage of germination

  water is imbibed in through the micropyle
• what is meant by imbibed


  taken in
• what does to absorption of water thought he micropyle lead to

  the swelling of the cotyledons
• what does the swelling of cotyledons lead to

  the splitting of the testa
• what does the splitting of the testa allow

  the entry of more oxygen for aerobic respiration
• in germination what happens after the cotyledons swell and the testa split

  the food reserves from the cotyledons are hydrolyzed
• in germination why must the food reserves be hydrolyzed

  to they can be changed into soluble forms for transport
• give 4 examples of food found in the cotyledons that are hydrolyzed for transport

  Starch , proteins, lipids and some seeds
• what is an example of a substance that food reserves can be hydrolyzed into for transport

  maltose
• in germination what happens to the soluble forms of food that are produced from the hydrolysation of the food reserves

  they are transported to the growing points of the embryo
• what does the hydrolysed food reserves supply to the growing points of the embryo

  sources of energy for respiration and growth
• what are two growing points of the embryo

  radicle and plumule
• in germination what happens to the plumule once it emerges from the soil

  the leaves will unfurl and begin to photosynthesise
• what will the plant be once the leaves unfurl form teh plumule

  independent