BIO 171 FINAL EXAM 3 | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+

Biodiversity ANSWER: Variety of life in the particular habitat or ecosystem Species is diverse when it contains many different kinds of organisms Disturbance ANSWER: Severe physical impacts on a habitat, such as those caused by storms, earthquakes, or road building. AFFECT POPULATIONS REGARDLESS OF THEIR DENSITIES. USUALLY UNPREDICTABLE. Evenness ANSWER: measure of relative proportion of each species Community ANSWER: set of all populations found in a given place Latitudinal Diversity Gradient Deeagles - Stuvia US ANSWER: Species diversity generally peaks near the equator and declines towards the poles Microbiome function ANSWER: edcuate immune system cells, assist digestion and nutrient absorbtion, provide barrier for Causes of latitudinal gradient ANSWER: 1. High solar impact, plenty of rainfal, leading to high primary productivity which leads to high diversity of consumers and decomposers 2. Tropics as cradle- older, more time for speciation 3. Tropics as museum- lower extrinction rates because climate is more stable 4. Strong biotic interactions- coevolution divides speciation 5. Tropic habitats have a larger area, larger area= more speciation Primary successsion ANSWER: recovery of community affects all organisms including soil are removed slow process, soil must form, establish microbial community, accumulate organic molecules, starts from rock, plants must colonize Fecal transplant Deeagles - Stuvia US ANSWER: Replacing missing microbes in the gut by transplanting fecal material from healthy donors into patients with C. difficele. richness ANSWER: # of species in a community