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Bio 100 Final SDSU Exam 2025 Questions and Answers Ecology - ....ANSWER ...-The study of the interactions between organisms and their environment. At what levels of organization do ecologists work? - ....ANSWER ...-1. Individual organisms 2. Populations of organisms (same species) 3. Communities of organisms (different species that interact with one another) 4. Ecosystem (all living organisms that interact in a particular area) 5. Biosphere (all organisms) Population Distribution - ....ANSWER ...-Where populations are found on earth What kind of factors determine distribution? - ....ANSWER ...-1. Abiotic (physical) factors. Non-living like temperature, geography, water availability. 2. Biotic factors (living) predators, parasites, competition of resource What is population density? - ....ANSWER ...-Indicates size, The number of organisms per unit of area/volume (used when there is a great number of organisms in a population. …FOR STUDENTS ONLY…©️2025 ALL RIGHTS RESERVED… 1