The of the eye is responsible for keeping objects in focus by changing its shape. a. pupil b. retina c. lens d. rods

Ais a group of individuals of the same that exist together in the same place at the same time

How do the sperm cells get from the stigma to the ovules? a. they slide down the petals to the bottom of the flower. b. they travel through pollen tubes. c. they travel along filaments. d. insects carry the sperm cells from the stigma to the ovules.

What gases are carried by the blood