Bio 322 Exam 2 Newest 2026 Questions and
Correct Detailed Answers Already Graded A+
Fireflies of different species are not able to recognize each other as potential
mates due to the pattern of flashes. What type of reproductive isolating
mechanism is this an example of? - CORRECT ANSWER-Behavioral isolation
Which of the following reasons typically causes hybrid sterility? - CORRECT
ANSWER-Incompatible number of chromosomes
True or False: Congenital differences are due to environmental factors during
development. - CORRECT ANSWER-True
True or False: Mutations within somatic cells can be passed down to offspring. -
CORRECT ANSWER-False
Which of the following mechanisms is the only way to introduce novel variation in
a species? - CORRECT ANSWER-Mutations
,Peripatric speciation occurs when - CORRECT ANSWER-A small population
splits from the main population
During secondary zones, hybrids have increased fitness within the hybrid zone
and outside of the hybrid zone. Assuming fitness does not change, what will
eventually happen to the two species? - CORRECT ANSWER-Reproductive
barriers will break down and the two species will become one
Polyploidy in plants typically results in what? - CORRECT ANSWER-Larger cells,
seeds, and pollen grains
Prezygotic - CORRECT ANSWER-barrier to transference of gametes to other
species (premating/postmating)
Postzygotic - CORRECT ANSWER-barrier after transference of gametes to other
species (postmating)
Haploid - CORRECT ANSWER-one set of chromosomes
Diploid - CORRECT ANSWER-two sets of chromosomes
, Polyploid - CORRECT ANSWER-more than two sets of chromosomes; triploid,
tetraploid, hexaploid
What causes a plant to be larger? - CORRECT ANSWER-having more than two
sets of chromosomes
Ecological Isolation - CORRECT ANSWER-Two types:
Temporal
Habitat (geographical)
Temporal Isolation - CORRECT ANSWER-breed at different times
Habitat (Geographical) Isolation - CORRECT ANSWER-live in different habitats
Behavioral Isolation - CORRECT ANSWER-specific mate recognition; can occur
due to courtship rituals, pheromones, visual and acoustic cues
Morphological - CORRECT ANSWER-parts don't fit; different morphology
between males and females of different species
Correct Detailed Answers Already Graded A+
Fireflies of different species are not able to recognize each other as potential
mates due to the pattern of flashes. What type of reproductive isolating
mechanism is this an example of? - CORRECT ANSWER-Behavioral isolation
Which of the following reasons typically causes hybrid sterility? - CORRECT
ANSWER-Incompatible number of chromosomes
True or False: Congenital differences are due to environmental factors during
development. - CORRECT ANSWER-True
True or False: Mutations within somatic cells can be passed down to offspring. -
CORRECT ANSWER-False
Which of the following mechanisms is the only way to introduce novel variation in
a species? - CORRECT ANSWER-Mutations
,Peripatric speciation occurs when - CORRECT ANSWER-A small population
splits from the main population
During secondary zones, hybrids have increased fitness within the hybrid zone
and outside of the hybrid zone. Assuming fitness does not change, what will
eventually happen to the two species? - CORRECT ANSWER-Reproductive
barriers will break down and the two species will become one
Polyploidy in plants typically results in what? - CORRECT ANSWER-Larger cells,
seeds, and pollen grains
Prezygotic - CORRECT ANSWER-barrier to transference of gametes to other
species (premating/postmating)
Postzygotic - CORRECT ANSWER-barrier after transference of gametes to other
species (postmating)
Haploid - CORRECT ANSWER-one set of chromosomes
Diploid - CORRECT ANSWER-two sets of chromosomes
, Polyploid - CORRECT ANSWER-more than two sets of chromosomes; triploid,
tetraploid, hexaploid
What causes a plant to be larger? - CORRECT ANSWER-having more than two
sets of chromosomes
Ecological Isolation - CORRECT ANSWER-Two types:
Temporal
Habitat (geographical)
Temporal Isolation - CORRECT ANSWER-breed at different times
Habitat (Geographical) Isolation - CORRECT ANSWER-live in different habitats
Behavioral Isolation - CORRECT ANSWER-specific mate recognition; can occur
due to courtship rituals, pheromones, visual and acoustic cues
Morphological - CORRECT ANSWER-parts don't fit; different morphology
between males and females of different species
