Which phrase best describes the mass movement of particles? sediment flowing down a slope
sediment collecting on an existing surface
transporting materials to a new location
breaking materials into smaller particles

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.