What evidence supports the theory that the elements for life came from outer space? i need 3 pieces of evidence

What kinds of molecules can pass through the cell membrane without any problem?

Follow the directions for self-quiz question 8, draw it, by labeling the appropriate structures with these terms, drawing lines or brackets as needed: chromosome (label as replicated or unreplicated), centromere, kinetochore, sister chromatids, nonsister chromatids, homologous pair, homologs, chiasma, sister chromatid, cohesion

Mitosis occurs in a step by step sequence. predict what would happen if a step was missing or the sequence got out of order. explain!