BIO 101 EXAM 3 WWU EXAM(ACTUAL
EXAM) WITH CORRECT ACTUAL
QUESTIONS AND CORRECTLY WELL
DEFINED ANSWERS LATEST ALREADY
GRADED A+ 2026
what are density independent factors - ANSWERS-not
caused by population density, but by chance
- fires, dams breaking, logging issues, etc.
niche partitioning - ANSWERS-when two species are in
competition for resources so they both altar their use of the
niche in order to divide the resources
competitive exclusion - ANSWERS-when two species both
occupy an area and on utilizes the resources more efficiently
& eventually drives the other into local extinction
what is speciation - ANSWERS-macroevolution
, what is the founders effect - ANSWERS-(genetic drift)
when a population moves to a new area where there is no
receiving population and they must inbreed - no diversity
what is meiosis - ANSWERS-random assortment of alleles
being inherited
what is the bottleneck effect - ANSWERS-when a random
event kills off a large portion of a population and only the
surviving population can reproduce
natural selection - ANSWERS-the process whereby
organisms better adapted to their environment tend to
survive and produce more offspring
always benefits
three conditions of natural selection - ANSWERS-1. genetic
variation for a trait
2. trait must be heritable
3. certain alleles confer a reproductive advantage and
increase in the population
EXAM) WITH CORRECT ACTUAL
QUESTIONS AND CORRECTLY WELL
DEFINED ANSWERS LATEST ALREADY
GRADED A+ 2026
what are density independent factors - ANSWERS-not
caused by population density, but by chance
- fires, dams breaking, logging issues, etc.
niche partitioning - ANSWERS-when two species are in
competition for resources so they both altar their use of the
niche in order to divide the resources
competitive exclusion - ANSWERS-when two species both
occupy an area and on utilizes the resources more efficiently
& eventually drives the other into local extinction
what is speciation - ANSWERS-macroevolution
, what is the founders effect - ANSWERS-(genetic drift)
when a population moves to a new area where there is no
receiving population and they must inbreed - no diversity
what is meiosis - ANSWERS-random assortment of alleles
being inherited
what is the bottleneck effect - ANSWERS-when a random
event kills off a large portion of a population and only the
surviving population can reproduce
natural selection - ANSWERS-the process whereby
organisms better adapted to their environment tend to
survive and produce more offspring
always benefits
three conditions of natural selection - ANSWERS-1. genetic
variation for a trait
2. trait must be heritable
3. certain alleles confer a reproductive advantage and
increase in the population
