Hello children,
Remember Jonathan Lim's question when we were discussing on the question whereby a seed was placed in a zip lock bag and it still germinates? Below is an excerpt from Wiki explaining how air (oxygen that is) is used before the seed leaves appear. It means oxygen is still needed when the seed is not making food. It's needed for the energy making process called "respiration" (digested food + oxygen = energy).
When the condition is right (there's air, water and warmth), the seed will "wake" and start the process of germinating. Wonderful isn't it :)
Oxygen - is required by the germinating seed for metabolism:[2] If the soil is waterlogged or the seed is buried within the soil, it might be cut off from the necessary oxygen it needs. Oxygen is used in aerobic respiration, the main source of the seedling's energy until it has leaves, which can photosynthesize its energy requirements.[1] Some seeds have impermeable seed coats that prevent oxygen from entering the seeds, causing seed dormancy. Impermeable seed coats to oxygen or water, are types of physical dormancy which is broken when the seed coat is worn away enough to allow gas exchange or water uptake between the seed and its environment.
Taken from Wikipedia
13 comments:
So Mr Azhari, seeds doesn't need air to germinate right? My assessment book says need.
So it means that when germinating a seed, best is to germinate the seed in a dump wool than burrying within the soil.
Cassandra, it is "damp" not "dump".
Mr Azhari, does 1 teaspoon of "anti matter" cost the whole of USA?
Ok thanks for correcting me...Hiaz...don't know what marks am i going to get for Science exam paper!!!
Just relax and just do your best Cassandra!
Ya..But anyway, thanks.
Justin, stop talking about anti-matter and focus on matter! And Germination needs air, warmth and water!
Ok Mr Azhari! By the way choose all the people that Yi Jing suggested! And plus Samuel! OUr class will become a bit good[I think]
Justin, can tell me who Yi Jing choose??
dont tell her
PLzz.....hiaz...up to you la, never mind if you don't want to tell me.
I tell you in MSN liao lar Cassandra.
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