BIO 182 Exam 2 Quizzes & Ans 2024
A donkey and a horse can mate and produce a mule. Why are they not considered to be the same species?
a. the mule is bigger than both the donkey and the horse
b. the mule is sterile
c. the mule can only mate with donkeys
d. the mule will only mate with other...
BIO 182 Exam 2 Quizzes & Ans 2024
A donkey and a horse can mate and produce a mule. Why are they not considered
to be the same species?
a. the mule is bigger than both the donkey and the horse
b. the mule is sterile
c. the mule can only mate with donkeys
d. the mule will only mate with other mules
e. the mule will only mate with horses
B. The mule is sterile
Organisms A and B are suspected to be the same species. Which of the following
would provide the ultimate proof?
a. detailed morphological comparisons
b. studying the habitats that they live in to see if they are the same
c. interbreeding and producing offspring that can breed
d. determining similarities and differences in behavioral characteristics
c. interbreeding and producing offspring that can breed
A cross between two different species results in a
a. new species.
b. physiological aberrant.
c. hybrid.
d. mutant.
c. hybrid
Which of the following are prezygotic isolating mechanisms? Select all that apply.
a. temporal isolation
b. hybrid inviability
c. allopolyploidy
d. behavioral isolation
e. gametic barrier
f. autopolyploidy
a. temporal isolation
d. behavioral
e. gametic barrier
Isolating mechanisms that happen during or before fertilization are termed
a. hybrid sterility.
b. prezygotic.
c. postzygotic.
d. sympatric.
b. prezygotic
Cicadas can spend years underground before emerging and mating. What causes
13-year and 17-year cicadas to be different species?
a. hybrid sterility
b. habitat preferences
c. behavioral differences
d. temporal isolation
d. temporal isolation A superhighway is put down in a field separating a population of snails. Over time, they acquire mutations and become two different species. This is an example of _____ speciation.
allopatric
Allopatric speciation is best explained by _____ isolation.
geographical
The difference between dispersal and vicariance when considering allopatric speciation is that dispersal has organisms leaving the homeland for a different one while vicariance
a. is when a natural occurrence physically separates the population.
b. only happens to the offspring of the original species.
c. is when members are forcibly moved to another location.
d. windstorms carry members of the population far away.
e. members of the population leave due to depleted resources.
a. is when natural occurrence physically separates the population
Island archipelagos which often allow rapid speciation to occur causing organisms to quickly adapt and fill different niches are good places to see
a. gametic mortality.
b. temporal isolation.
c. adaptive radiation.
d. allopolyploidy.
c. adaptive radiation
Why would two species, one formed by allopolyploidy, not be likely to fuse back into one species?
a. the hybrids would demonstrate greater vigor than the parents
b. body parts would likely no longer fit together for fertilization
c. wrong numbers of chromosomes to allow for hybridization
d. habitat preferences would be too different
e. temporal isolation would be too well established
c. wrong numbers of chromosomes to allow for hybridization
The male peacock spider, Maratus volans, is beautiful and talented. He has an elaborate courtship display, waving legs and raising a colorful abdominal flap to attract females. The female's attraction to the male's display constitutes a _____ isolating mechanism. If by chance a female from a related species mated with the M. volans male, the fertilized eggs would be unlikely to develop - a _____ isolation
mechanism.
prezygotic; postzygotic
The fish Astyanax mexicanus has populations in surface lakes and in caves. Cave
populations lose their eyes through degeneration and are unpigmented, while surface populations have normal eyes and pigment. The two groups can form hybrids when mated in the laboratory, but rarely interact in the wild. This is an example of a species currently undergoing
a. hybridization.
b. immigration.
c. allopatric speciation.
d. sympatric speciation.
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