Carrot and celery sticks can get very limp if placed in salt water. If you put them back in a jar of tap water, they become crisp again. Why is this?...

Carrot and celery sticks can get very limp if placed in salt water. If you put them back in a jar of tap water, they become crisp again. Why is this? Explain the mechanism that causes this to come about in such a way as to demonstrate your understanding of this mechanism. 

List

at least four ways that photosynthesis and respiration are similar. List at least four ways they are different. How do they complement one another? Essay answers are limited to about 500 words (3800 characters maximum, including spaces).