0
lettuce is made out of little sacks of water called cells, and normally they are full of water and nice and rigid, so the lettuce is springy and firm.
Now the walls of these cells are made of a stuff a bit like a really fine netting that will let water through but not salt (a partially permiable membrane). Now water and salt prefer being mixed together than seperated, and water will move through the cell wall towards whichever side is the saltiest, this is called osmosis.
This means that because outside is saltier the water leaves the cells, so the cells empty, and like a half full bag of water, go all floppy so the whole lettuce leaf goes floppy
Now if you put the leaf in fresh water there are more salts in the leaf than in the water, so water will move back into the cells making them blow up like balloons again and become all strong and rigid.
What else can I help you with?
Is lettuce a leaf?
Water lettuce does bear flowers, but they are usually hidden down deep under the leaves. Water Lettuce is a floating plant from Tropical America, and although it grows in water, it does not like water on its leaves.
Why do lettuce go limp when left in the sun Is it because the lettuce cell release water from the vacuole - causing the lettuce to become limp?
yes. the water in the cell evaporates through the cell wall, removing the structure that keeps the cell in a rigid, fixed shape.
Why does a picked lettuce become limp when left in the sun?
yes This is due to the plant losing moisture, mostly water, as it is that which keeps leaves rigid the picked plant becomes limp. This happens to a certain extent with all plants - it is very noticeable in ones with thin leaves (as evaporation of moisture is quicker).
When a river leaves silt on the land what is it doing?
it is what's left after water leaves..=]
Why do dead leaves gradually shrink if left in a warm and damp place?
The main reason is the dehydration or loss of water.
What happens to a raw egg when left in mixture of water and vinegar?
When a raw egg is left in a mixture of water and vinegar, the vinegar dissolves the eggshell which is made of calcium carbonate. This leaves the egg membrane intact, causing it to become rubbery and transparent.
What do people think Santas reindeer eat?
When I was younger I thought they ate carrots and lettuce and all that until I realized that when I left it out at night my Dad would bring it back in and leave some lettuce leaves on the ground.
Can lettuce be left out at room temp?
Yes, lettuce can be left out at room temperature but this will make it go bad faster if it is not kept in a sealed bag. Although lettuce goes bad pretty quickly anyway, in the fridge or not.
When do you pick iceberg lettuce?
Romaine, or Cos lettuce,can be harvested when the head is neither too 'squishy' when pressed or really hard. Somewhere in-between is right. They would have over 30 leaves by that stage. If Romaine lettuce is left too long it will be bitter, so err on the side of under-readiness if in doubt.
Will lettuce grow back after cutting it?
Yes, lettuce can regrow after being cut if the roots are left intact. This process is known as regrowing or regenerating lettuce.
How much does romaine lettuce weigh?
The average romanian lettuce can weigh from anywhere between 18,000kg to 500g. It really just varies on the particular size of the lettuce itself. If purchased from a local supermarket such as woolworths or coles, the lettuce is most likely tainted, so I would not recommend this. To cook the lettuce, it must first be lightly washed under a weak stream of water. Once you have dug a hole in your back yard, you must then place the damp lettuce inside the hole, then begin to make your fire. When you have preheated the fire to 209 degrees, your lettuce is then ready to be put in. Once left for 10 minutes, the lettuce is ready to serve. NOTE: The lettuce is made of 100% water.
What is the evaporation of water from leaves to plant?
evaporation helps by taking left over water evaporation helps by taking left over water
