Anthro 2B Egan final Comprehensive
Questions (Frequently Tested) with
Verified Answers Graded A+
Macro-Evolution - Answer: above the species level (new species)
Micro - Evolution - Answer: below species level (a change is gene frequency within a population
over time)
Speciation - Answer: Process whereby one species splits into 2
Reproductive Isolating Mechanisms - Answer: factors that isolate two populations of a species
from breeding
Extrinsic (RIM) - Answer: geographic solation ex: tectonic plates moving
Instrinsic (RIM) - Answer: no geographic isolation; "internal"
Pre-zygotic (RIM) - Answer: preventing sperm from getting to egg
Post-zygotic (RIM) - Answer: lack of reproduction (sterile; ex: mule)
Natural Selection - Answer: The rate of evolutionary change is directly proportional to the
degree of variability in the population
Population Variability - Answer: difference in genetic variation in a population
, Relationship between Natural Selection and Population Variability - Answer: Natural selection
can decrease the genetic variation in populations of organisms by selecting for or against a
specific gene or gene combination (leading to directional selection)
Anagenesis - Answer: - Slow and gradual
- Evolution in a line
Cladogenesis - Answer: Speciation proper
Splitting
Phyletic Gradualism - Answer: - emphasizes anagenesis
- slow gradual change
- position that Darwin took
Punctuated Equilibrium - Answer: - emphasizes cladogenesis
- most change during speciation events - long period where things don't change and then
suddenly do (speciation), then back to little change until sudden short burst of change again
(cycle)
Adaptive Radiation - Answer: - Macroevolution process
- Rapid expansion and diversification of a group of organisms as they adapt to newly available
ecological space
Generalized - Answer: - Macroevolution process
- Rapid expansion and diversification of a group of organisms as they adapt to newly available
ecological space
- "Jack of all trades, ace of none" - can live in range of different niches, eat/do a variety of things
but they don't do them very well since they are not specialized
Questions (Frequently Tested) with
Verified Answers Graded A+
Macro-Evolution - Answer: above the species level (new species)
Micro - Evolution - Answer: below species level (a change is gene frequency within a population
over time)
Speciation - Answer: Process whereby one species splits into 2
Reproductive Isolating Mechanisms - Answer: factors that isolate two populations of a species
from breeding
Extrinsic (RIM) - Answer: geographic solation ex: tectonic plates moving
Instrinsic (RIM) - Answer: no geographic isolation; "internal"
Pre-zygotic (RIM) - Answer: preventing sperm from getting to egg
Post-zygotic (RIM) - Answer: lack of reproduction (sterile; ex: mule)
Natural Selection - Answer: The rate of evolutionary change is directly proportional to the
degree of variability in the population
Population Variability - Answer: difference in genetic variation in a population
, Relationship between Natural Selection and Population Variability - Answer: Natural selection
can decrease the genetic variation in populations of organisms by selecting for or against a
specific gene or gene combination (leading to directional selection)
Anagenesis - Answer: - Slow and gradual
- Evolution in a line
Cladogenesis - Answer: Speciation proper
Splitting
Phyletic Gradualism - Answer: - emphasizes anagenesis
- slow gradual change
- position that Darwin took
Punctuated Equilibrium - Answer: - emphasizes cladogenesis
- most change during speciation events - long period where things don't change and then
suddenly do (speciation), then back to little change until sudden short burst of change again
(cycle)
Adaptive Radiation - Answer: - Macroevolution process
- Rapid expansion and diversification of a group of organisms as they adapt to newly available
ecological space
Generalized - Answer: - Macroevolution process
- Rapid expansion and diversification of a group of organisms as they adapt to newly available
ecological space
- "Jack of all trades, ace of none" - can live in range of different niches, eat/do a variety of things
but they don't do them very well since they are not specialized
