What is the purpose of the nuclear membrane? why is it important?

The production of cells during mitosis into specialized function is recombination or differentiation

Which of these statements is true about autotrophs, but not heterotrophs? a. they use sugar and oxygen to make carbon dioxide and water.b. they use chlorophyll and oxygen to make carbon dioxide and water.c. they use sunlight, water, and carbon dioxide to make sugars.d. they use sunlight, water, and oxygen to make chlorophyll.

In general, characteristics that an organism survive and reproduce become more common in a population over time. what mechanism of evolution cause this change?