Changes in water pressure within guard cells cause the cells to open or close the stoma. This response helps the plant maintain homeostasis by --

A-stabilizing the plants temperature through the evaporation of water

B-regulating the amount of water the plant loses during transpiration

C-allowing oxygen needed for photosynthesis to enter the plant

D-enabling the plant to release more carbon dioxide at night for photosynthesis

a compound light microscope is used to magnify objects in steps.  

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the answer is definitely 36.

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the species living around the vents are especially good at dispersal.  

deep-sea vent originates on the floor of the ocean when seawater circulates through hot volcanic rocks, usually situated where the new oceanic crust is being produced.  

biological dispersal refers to the movement of species from their location of birth to their site of breeding, or from breeding site to another. similarly, the oceanic dispersal refers to the movement of the species from one land mass to another by sea crossing.