Qualification > Sciences
IGCSE BIOLOGY DOUBTS HERE !!!!
The Golden Girl =D:
--- Quote from: Kimo Jesus on September 25, 2010, 10:41:39 am ---Greetings !
I have a question ,
In my book the drawing of a normal animal cell is different to a 'liver cell' , i can see that liver cell has the following extra:
Ribosomes on endoplasmic reticulum
a 10x bigger mitochondria!!
should i mark the difference? so when i come to draw a liver cell should you add those 2?
thx in advance !
--- End quote ---
Well for me i solved almost all the pps for Bio ..and that wasn't there ....so believe it's negligible ;) srry what i meant is just forget it :)
Deadly_king:
Nope.......no need to mark these differences. They are negligible. Ribosomes found on the endoplasmic reticulum is known as rough E.R and it may occur in any animal cell.
Moreover the size of the mitochondria does not mean anything except that perhaps it carries out much respiration. However these are not considered as differences :)
WARRIOR:
• Describe the importance of diffusion of gases
and solutes and of water as a solvent
THX
Deadly_king:
--- Quote from: Kimo Jesus on October 02, 2010, 06:34:16 am ---• Describe the importance of diffusion of gases
and solutes and of water as a solvent
THX
--- End quote ---
Importance of diffusion of gases :
Carbon dioxide and Oxygen diffuse in and out of leaves. They are required for both respiration and photosynthesis (the two most important processes for life to occur).
Diffusion of solutes :
Transport of materials. Water or the solution acts as transport medium. Example : blood
Water as a solvent :
1. This is important as it allows ions and polar molecules to move freely within itself. Some specific ions are essential for survival of plants (e.g). They dissolve in water to get it specific cells.
2. Oxygen and carbon dioxide diffuse within a layer of moisture around mesophyll cells in order to get in. It facilitates diffusion.
Again water acts as a transport medium.
Hope it helps :)
Vin:
Thanks a lot King. Do you mind if I add exactly same stuff to the bunch of bio notes?
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