cellulose, protein, chlorophyll?
There is no accurate answer, you would have to weigh it at the grocery store to find out.
Normally you would find a 'lettuce' leaf in a burger.
choroplast
In paper and gunpowder
Pastry is not usually present in explosive volcanic eruptions also you seldom find lettuce leaves or sharks.This answer is absolutely true and you may find it surprising. However, when you ask a question in the negative "not present" then almost everything you can think of would provide a true answer.
Lettuce - cheese - tomatoes - mayonnaise - ham - salami - bologna
You can find dried flowers at an online platform such as Dried Flowers and Decor is the most popular website in UK provide variety of dried and preserved flowers at the best price.
You can find more information about freeze dried food by researching with books. The library most likely has many books about freeze dried foods and how to do the process.
lettuce
find out ur self man
Well, first you have to get him comfortable. Try to find out what he likes. Turtles like lettuce. Try that. Yes, lettuce is good, but not iceberg lettuce. try carrots, celery, lettuce, broccoli, or cauliflowerl.
You can find beetles in your backyard or your garden , they are deep underneath the ground most of the times . You would see them commonly if you are growing vegetables like lettuce . But i generally prefer going to insect shops .