Can I get help with this? Thanks

Which statement justifies why angle ebc measures 90?

Aflower has 26 chromosomes. to create a new flower, how many chromosomes would a sperm cell have? what is this process called? part 2: within a flower cell that has 26 chromosomes, how many chromosomes would a cell that is created within the stem of a flower as it grows, have? what is this process called?

Find the distance between (0,5) & (-4,2)