HESI A2 Exam – Biology 2023 graded A 100% verified

what is the hierarchic organizational system for nomenclature? - kingdom, phylum, class, order, family, genus, species what are the steps of the scientific method? - observation, hypothesis, experiment, conclusion what is the chemical composition of water? - two hydrogen atoms covalently bonded to an oxygen atom what is the most significant aspect of water? - polarity of its bond what does water's polarity allow for? - hydrogen bonding and versatile solvent what does hydrogen bonding in water cause? - high specific heat value, strong cohesive and strong adhesive properties what is the definition of specific heat? - the amount of heat necessary to raise the temperature of one gram of that molecule by one degree Celsius what is good to note about water's specific heat value? - it is relatively high what does a relatively high specific heat value allow for? - resists shifts in temperature how does the high specific heat value of water play a role in the biosphere? - oceans and large bodies of water are able to stabilize climates what is cohesion? - the ability of a molecule to stay bonded or attracted to another molecule of the same substance what is adhesion? - the ability of a molecule to bond or attract other molecules or substances what occurs when water freezes? - lattice crystal is formed, molecules spread apart what are the most important biological molecules? - carbohydrates, lipids, proteins, nucleic acids what are carbohydrates? - generally long chains or polymers of sugars