How can alternative practices lead to a reduced impact on waterways? a. Alternative practices will completely eliminate changes to waterways. b. Alternative practices can completely reverse the damage already done to waterways. c. Alternative practices will allow industry greater access to waterways. d. Alternative practices can lead to a decrease in pollution, erosion, and damage to waterways. Please select the best answer from the choices provided

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation:

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.

light dependent reactions:

light independent reactions:

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