Iwill give brainliest and ! for reading how do you grade a test i know how to get the percentage but how do you get a+ a a- b+ b b- etc you ; )

A+ : 97%+
A : 93%-96%
A- : 90%-92%
B+ : 87%-89%
B : 83%-86%
B- : 80%-82%
C+ : 77%-79%

Each eukaryotic cell has a plasma membrane, cytoplasm, a nucleus, ribosomes, mitochondria, peroxisomes, and in some, vacuoles; however, there are some striking differences between animal and plant cells.