BIO 182 Exam 1 Questions with 100% Correct Answers | Verified | Updated 2024

BIO 182 Exam 1 Questions with 100% Correct Answers | Verified | Updated 2024 What is the definition of Ecology? - answerStudy of interactions among organisms and their environment At what levels of life are focused on while studying ecology? - answerOrganismal ecology, population ecology, community ecology, ecosystem ecology What is the difference between a biotic and abiotic factor in the environment? - answerBiotic factor is anything living Abiotic factor is anything nonliving What is a biome? And what are they characterized by in both aquatic (water) and terrestrial (land) areas? - answerA biome is a major aquatic or terrestrial life zone Characterized by the physical environment in aquatic biomes and the vegetation type in terrestrial biomes There are two major classes of aquatic biomes that are divided based on their salt content. What are they? - answerFreshwater (less than 1%) and Marine (about 3%) What % of earth does fresh water cover? - answerLess than 1% Be able to understand and explain the benthic realm, photic zone, and aphotic zone as is occurs in lakes and ponds. - answerBenthic Realm: at the bottom of all aquatic biomes, made up of sand and organic and inorganic sediments, occupied by communities of organisms that are collectively called benthos Photic Zone: Light is available for photosynthesis, includes shallow water near shore and upper area of water away from shore Aphotic Zone: Deeper with light levels too low to support photosynthesis Unlike lakes and ponds which are standing water, rivers and streams are flowing water. Be able to explain some of the differences in properties that occur near the source of the stream vs. downstream. - answerSource of stream: clear, cold, swift, low in nutrients Downstream: murkier, warmer, slower, and higher in nutrients What is the open water part of the ocean called? - answerpelagic realm How deep is the photic zone in the ocean? - answer200 meters Know the 9 major terrestrial biomes, and what the temperature and precipitation regime of each is. - answerTropical Forest: Warm temp with over 400cm in precipitation Savanna: Warm temp with 30-50 cm (12-20in) precipitation Desert: Very hot or very cold with less than 30 cm (12in) precipitation Chaparral: Mild rainy winters and hot dry summers with 25-44cm precipitation Temperate Grassland: Temps vary greatly between -20c and 30c with 25-75 cm of precipitation Temperate Broadleaf Forest: Cold winters and warm summers with 75-150 cm of precipitation Coniferous Forest: -40c to 20c with 30-90cm precipitation Tundra: Very cold, 15-25cm precipitation Polar Ice: Freezing, less than 10in of precipitation Be able to explain how and why a mountain can actually show several major biomes from the bottom to the top of the mountain (hint---what happens when you go to the top of a mountain?). - answerAs the elevation becomes higher, air temperature drops and there is more precipitation at the top of a mountain t