Which of the following is not a source of water pollution?

discharges of sediment

industry waste

city sewage

none of the above

How do you date a sample of rock that you suspect as being one of the earliest on earth

What is the function of the root cap? a. extra-absorbent cells in the root cap absorb more water and nutrients b. protect the meristematic area of the stem c. contains sensors for sunlight d. increases surface area of the root

Where is the nictitating membrane found? a. between the eyelid and the eyeball b. between the retina and the optic nerve c. between the outer and middle ear d. in the organ of corti in the middle ear