Exam 1 part 2

Question 1

what is an Organism and what concerns do we have at this level.

Answer 1

individual cell or multicellular entity; complete unit to maintain vital activities: energy intake, use, growth/repro

concerns: survival + repro and unit of natural selection

Question 2

what is a Community and what concerns are there at this level

Answer 2

sum of all pop’s w/in specific region or
area
concerns: interactions among pop’s

Question 3

what is a Population and what concerns are there at this level

Answer 3

all org’s of 1 species sharing gene pool at 1 time in defined area

concerns: pop dynamics and unit of evolution

Question 4

what is an Ecosystem and what concerns are there at this level

Answer 4

sum of community + environment w/in specific region

concerns: energy and nutrient flow

Question 5

Darwinian mechanisms of evolution

Answer 5

natural selection which leads to adaptation

Question 6

Non-Darwinian mechanisms of evolution

Answer 6

– Mutation Pressure
– Genetic Drift
– Gene Flow
* Random—no adaptation
* Affects small populations more

Question 7

Darwinian Fitness (W)

Answer 7

A measure of the ability of individual phenotype to survive and reproduce
W=1-s

Question 8

Selection coefficient, s

Answer 8

selection pressure acting against given phenotype
s=(higher repro. - lower repro.)/higher repro.