Why might a dysfunctional gene affect one type of cell in the body, but not other types of cells?

Which are observations about the tree on the right ,? check all that apply

What feature of cell theory is best demonstrated in the image

Which of these is a major trend in land plant evolution? a) the trend toward smaller size b) the trend toward a gametophyte-dominated life cycle c) the trend toward a sporophyte-dominated life cycle d) the trend toward larger gametophytes