Pop bio - Study guides, Class notes & Summaries

Define pest - an organism that damages another organism--in crop production this can be weeds, insects, diseases and pests Define integrated pest management (IPM) - in Ag, IPM is a pest control strategy is a pest control strategy that uses a variety of methods such as mechanical, physical, genetic, biological, cultural and chemical management--done in 3 stages: 1. Prevention 2. Observation 3. Intervention--it is an ecological approach with a main goal of significantly reducing or eliminatin...

What is a population? - ANSWER interbreeding of a group of individuals who have the same species, geographics and time period. The population is exchanging genes What is the purpose of variability within a pop? - ANSWER some genetic variants have advantages and natural selection can act on variation Two process that can occur if a pop. cant exchange genes - ANSWER genetic divergence and speciation Decreasing variation in a species leads to- - ANSWER instability 3 levels of biodiversi...

PSYC 510 Exam 1 - Questions and Answers What is reliability? -degree of consistency of a measure (gives same result each time) What is validity? -degree of accuracy of a measure (is it measuring what its intended to measure) What is observed vs. true score? -Observed (what we see) 1)true score: actual degree the trait characterizes the p. 2)measurement error: score we did not intend to assess What are 2 types of error? -random: fluctuates each time something is measured (low reliability) -syst...

BIO 201 Exam Latest Updated 2024 WITH 100% CORRECT QUESTIONS AND ANSWERS POPULATION GROWTH MODEL - ANSWER-Nt+1 = Nt + Bt -Dt + It - Et Nt+1 = population size Nt = previous time interval Bt= births Dt= deaths It= immigration Et= emmigration Exponential Growth Model - ANSWER-overlapping generation continuous models ex: humans Change in Exponential Growth Model Equation - ANSWER-dN/dt = rN r = intrinsic rate r= birth rate - death rate N= population size Exponenti...

BYU BIO 100 Unit 3 Questions & Answers Biological Evolution - Answer-A change in the genetic characteristics of a population of organisms over time genes and environmental pressures - Answer-evolutionary changes are inherited by populations (example: mites) - Answer-do populations or individuals evolve? natural selection - Answer-process by which traits become more or less common in a population due to consistent effects upon the survival and or reproduction of their forbearers microevo...

BIO-107 test 1 Questions and Answers 100% Solved Microevolution Evolutionary change below the species level; Change in allele frequencies over generations. It is called micro evolution because it focuses on evolution in population, which is the smallest scale. (individuals do not evolve.) 3 mechanisms that cause allele change Natural seletion, genetic drift( chance events that alter allele frequencies), and gene flow (the transfer of alleles between populations). Population is a group...

What should you do with a victim that has frostbite and blisters? correct answers don't pop the blisters and wrap lightly with gauze what side of the body should you be on in the recovery position? correct answers left side ligament correct answers bone to bone 2 places to remove impaled object correct answers chest and cheek Emergency action steps correct answers CCC = check, call, care good samaritan law correct answers protects first responder standard of care correct answe...

what are the problems with over population? Why are we worried? 1) Famine and Disease. 2) loss of personal freedom 3) environment destruction When has most of the growth taken place in the population? Which decade have we seen the most growth? In the most recent decade. Right Now. Essay #1 Define Gause's Competitive exclusion principle. Give examples to show the experimental evidence supporting the principle. Causes hypothesis states that two species cannot occupy the same niche. If they atte...

Water Sanitation and Hygiene Questions and Answers Graded A+ What are the three problems with water -(Access) Not everyone has access to water 24/7 -(Quantity) Many families do not have enough water to satisfy their domestic and other needs -(Quality) Water is not safe in many regions Who is predominantly responsible for collection of water? women and children are predominantly responsible for collection Who is responsible for caring for children with diarrheal diseases? Women are often respon...

LMU Entrance Exam (Evolutionary Bio, Ecology, and Systematics) Fecundity maximum reproductive output Semelparity : all offspring produced in single event (favored in stable and predictable environments) Iteroparity offspring produced in many events throughout life (favored by unstable environments) Grazers attack a large number of prey but cause little damage on the individual level (mosquitos leeches, flies are grazers) Parasites symbiotic relationship where hosts fitness decreased while paras...