vesicle that fills with water (as it enters the cell by osmosis) and then contracts to squeeze water from the cell; an osmoregulatory vesicle

part of an experiment that does not change during the experiment

process by which groups of organisms independently evolve to similar forms

ocean ridges formed by marine invertebrates living in warm, shallow waters within the photic zone

ocean ridges formed by marine invertebrates living in warm, shallow waters within the photic zone

prokaryotic RNA polymerase consisting of α, α, β, and β' but missing σ; this complex performs elongation

rounded, fleshy underground stem that contains stored food

transparent layer over the front of the eye that helps focus light waves

collection of petals

wheel-like structure on the anterior portion of the rotifer that contains cilia and moves food and water toward the mouth

vessel that supplies the heart tissue with blood

vessel that takes blood away from the heart tissue back to the chambers in the heart

thick fiber bundle that connects the cerebral hemispheres

ground tissue found between the vascular tissue and the epidermis in a stem or root

outer layer of an organ like the kidney or adrenal gland