Biology 1407 Exam 1 Review Questions and Answers
Question 1.
Requirements for the hardy-weinberg equilibrium
Correct Answer: 1) no mutation 2) no selection among genotypes 3) no gene
flow 4) population size is infinite 5) mating is random
Question 2.
why broccoli was selected
Correct Answer: for stems and flowers
Question 3.
why brussels sprouts were selected
Correct Answer: for lateral buds
Question 4.
permian period
Correct Answer: formation of pangaea; amniotes split into reptiles and
mammals; volcanic eruptions blocked the sun, cooling climate and forming
glaciers, 96% of all species go extinct
Question 5.
devonian period
Correct Answer: evolution of bony fish, tetrapods and insects; seed plants
appeared; mass extinction from two meteorite impacts wiped out 75% of marine
life
Question 6.
silurian period
Correct Answer: marine life rebounded; first vascular plants appeared
Question 7.
autoploidy
Correct Answer: chromosome duplication in a single species
Question 8.
stabilizing selection
Correct Answer: preserves the average phenotype
Question 9.
types of prezygotic isolating mechanisms
Correct Answer: mechanical, temporal, behavioral, habitat, gametic
Question 10.
cretaceous period
Correct Answer: formation of modern continents; dinosaurs and snakes;
Page 1
, meteorite impact causes all land animals larger than 25kg to become extinct
Question 11.
postzygotic isolating mechanisms
Correct Answer: reduce the fitness of hybrid offspring
Question 12.
bottleneck effect
Correct Answer: environmental conditions that affect the genes that get passed
on; only a small number of individuals can survive
Question 13.
prezygotic isolating mechanisms
Correct Answer: prevents hybridization from occurring
Question 14.
when the 4 mass extinctions occurred
Correct Answer: Ordovician Period, Devonian Period, Permian Period,
Cretaceous Period
Question 15.
analogous structure
Correct Answer: looks similar, different function
Question 16.
carboniferous period
Correct Answer: insects evolved wings; land animals became more diverse
Question 17.
sympatric speciation
Correct Answer: speciation without a physical barrier
Question 18.
homology
Correct Answer: having the same/similar structure
Question 19.
cambrian explosion
Correct Answer: rapid diversification of life
Question 20.
Biogeography
Correct Answer: deals with the geographical distribution of plants and animals
Question 21.
The inventor of binomial nomenclature
Page 2
Question 1.
Requirements for the hardy-weinberg equilibrium
Correct Answer: 1) no mutation 2) no selection among genotypes 3) no gene
flow 4) population size is infinite 5) mating is random
Question 2.
why broccoli was selected
Correct Answer: for stems and flowers
Question 3.
why brussels sprouts were selected
Correct Answer: for lateral buds
Question 4.
permian period
Correct Answer: formation of pangaea; amniotes split into reptiles and
mammals; volcanic eruptions blocked the sun, cooling climate and forming
glaciers, 96% of all species go extinct
Question 5.
devonian period
Correct Answer: evolution of bony fish, tetrapods and insects; seed plants
appeared; mass extinction from two meteorite impacts wiped out 75% of marine
life
Question 6.
silurian period
Correct Answer: marine life rebounded; first vascular plants appeared
Question 7.
autoploidy
Correct Answer: chromosome duplication in a single species
Question 8.
stabilizing selection
Correct Answer: preserves the average phenotype
Question 9.
types of prezygotic isolating mechanisms
Correct Answer: mechanical, temporal, behavioral, habitat, gametic
Question 10.
cretaceous period
Correct Answer: formation of modern continents; dinosaurs and snakes;
Page 1
, meteorite impact causes all land animals larger than 25kg to become extinct
Question 11.
postzygotic isolating mechanisms
Correct Answer: reduce the fitness of hybrid offspring
Question 12.
bottleneck effect
Correct Answer: environmental conditions that affect the genes that get passed
on; only a small number of individuals can survive
Question 13.
prezygotic isolating mechanisms
Correct Answer: prevents hybridization from occurring
Question 14.
when the 4 mass extinctions occurred
Correct Answer: Ordovician Period, Devonian Period, Permian Period,
Cretaceous Period
Question 15.
analogous structure
Correct Answer: looks similar, different function
Question 16.
carboniferous period
Correct Answer: insects evolved wings; land animals became more diverse
Question 17.
sympatric speciation
Correct Answer: speciation without a physical barrier
Question 18.
homology
Correct Answer: having the same/similar structure
Question 19.
cambrian explosion
Correct Answer: rapid diversification of life
Question 20.
Biogeography
Correct Answer: deals with the geographical distribution of plants and animals
Question 21.
The inventor of binomial nomenclature
Page 2
