Can someone help me question for 4, 5, and 6?

When water freezes, it . contracts expands

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

The first generation of offspring from the cross of two parents is called the a. f1 generation b. f2 generation c. short generation d. p generation