BIO 2260 Practice Test Questions with 100% Correct Answers

what are the 2 assumptions of life history? 1. Energy is finite 2. Mortality and reproduction are related Talk about maturity and mortality graph? - High survivorship favours late mortality - You have a shorter life span if you matured early what is the trade-off between offspring number and size? - A plant can produce large seeds, but small amounts - Large size of egg, but fewer eggs what are the 2 types of breeding strategies? 1. Semelparity: reproduces once - large littler - small offspring - little parental care 2. Iteroparity: multiple reproduction - small litter - large offspring - parental care what are the characteristics favoured by r and k selection? r: - small body - not comp. favoured - high pop. growth - rapid development - single reprod. - many, but small offspring k: - large body - comp. is favoured - low pop. growth - slow development - multiple reprod. - small, but large offspring on a graph, what does a r vs. k species look like? - r will never reach carrying capacity, is all over the place, the environment is unpredictable - k will reach carrying capacity, grows then plateaus, the environment is predictable the plant life history triangle is composed of 3 things: 1. Competition 2. Stress-tolerant 3. Suderal the fish life history is composed of 3 things and explain: 1. Periodic: - low juv. survival (Ix) - high fecundity (Mx) - late maturity (a) 2. Equilibrium: - high - low - late maturity 3. Opportunistic: - low - low - early maturity