science aficionado

Ok!!! thks very much!!

I am not sure about these structures of a leaf! Is there a difference between the protoplasm and cytoplasm? If yes plz provide me with pictures as I am completely confused! From what I learned on the net: Protoplasm is the living contents of a living cell and is surrounded by a plasma membrane. It is a general term for the cytoplasm! So I concluded that the cytoplasm forms part of the protoplasm that is protoplasm is the whole organelles of a plant except cellwall whereas cytoplasm is the jelly like structure forming part of the cytoplasm! Plz help me to sort this out and have a proper definition of the protoplasm!

Thks for all the help And Sory for any inconveniences caused!

Question: A non-living thing such as a rock does not grow.However, a crystal immersed in a saturated solution may increase in size. HOW IS THIS CHANGE DIFFERENT FROM THAT OF A LIVING ORGANISM? Topic characteristics of living things How can I give a proper answer? Should I talk about cells and tissue expansion as we eat??? Plz help me to sort this problem out and to give a proper definition!

Thanks to all your answers and links. They have been very useful for me to understand it now!

When I usually goes swimming either in a river or in the sea my skin gets wrinkle!!!! Why does this happen?? Water is suppose to enter my body by osmosis as human body water concentration is lower ,that is 60% less than the water surrounding me which is approximately at 90% and which is 30% higher than the body concentration. What is the reason behind this?? I have made some researches and they are saying that the skin layer contains an oil but I dont understand how it works!!!! I need a suitable answer!! Tks for any humble requests in advance!!!