A) Cell wall (animal cells don't have these structures)
The mammoth is the most commonly known animal that lived during the Ice Age but is extinct today.
This might help: https://www.livescience.com/51793-extinct-ice-age-megafauna.html
300 calories represents the 100% of calories on the piece of cake.
If you want to know the percentage that represents 135 calories from fat, then you have to multiply 135 calories by 100%, and then divide the outcome by 300 calories:
(135 cal *100%)/300cal= 45%
A cell can be thought of as a "factory," with different departments each performing specialized tasks.
