30 points ! what is the state of michigan doing to fix the problem of purple loosestrifes? i need a source ( from where did you get the answer)

What causes the force that pushes magma from the magma chamber through the pipe and vent of a volcano?

If there are 350 trout found in 200 square feet of a pond measuring 1000 square feet what is the estimated trout population of the pond? a. 1350 b. 1550 c. 1750 d. 2000

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.