These got me dying

In which situations is the principle of cross-cutting relationship useful in determining relative age?

Rachel ate a piece of fruit and happened to drop the seeds in her backyard. after a few weeks, she saw a small plant with flowers growing in the backyard. which group does this plant belong to? a. angiosperms b. gymnosperms c. pteridophytes d. bryophytes e. chytrids

Which of these structures are found in both plant ans animal cells?