What is the cytoskeleton of a cell? what does it do?

The series of transgressions and regressions that produce cyclothems were likely produced by

Suppose you use three different scale to weigh a bag of oranges. one scale says the nag weighs 2.1 lb, and third says it weighs 2.1 lb. the actual weight of the bag of oranges is 2.153 lb. which of the following best decribes these results?

Sequence how oxygen accumulated in the atmosphere and the effect it had on life by completing the flowchart