hemoglobin {Ans: iron-containing protein in red blood cells that transports oxygen from the lungs to the tissues of the body}endospore {Ans: type of spore formed when a bacterium produces a thick internal wall that encloses its DNA and a portion of its cytoplasm}physiology {Ans: processes and functions of an organism}exoskeleton {Ans: the exterior protective or supporting structure or shell of many animals (especially invertebrates) including bony or horny parts such as nails or scales or hoofs}gametogenesis {Ans: the development and maturation of sex cells through meiosis}hypothalamus {Ans: a neural structure lying below the thalamus; directs eating, drinking, body temperature; helps govern the endocrine system via the pituitary gland, and is linked to emotion}