What are similarities and differences between cells from different organisms?

Nucleic acid certain protein cell membranes certain carbohydrates

What was the purpose of mendel's experiments with dihybrid crosses? a. to determine if dna was a transforming factor b. to determine if traits could be recessive c. to determine if traits affected each other d. to determine if traits had more than one allele

In general, are there any major differences that you can see? explain