chapter 14 Flashcards
(15 cards)
Speciation is _____.
he splitting of one species into two or more species
the transformation of one species into a new species over time
Which of the following correctly describes the biological species concept?
members of a species can interbreed
members of a species have a shared gene pool
members are unable to successfully breed with members of other species
Reproductive isolation occurs between the populations of a species but not between populations of different species.
f
Prezygotic isolating mechanisms are those that prevent reproduction attempts and make it unlikely that fertilization will be successful if mating is attempted.
t
A population of red maples will interbreed with a population of sugar maples.
f
A mating season specific to each species is a form of prezygotic isolation.
t
The rejection of finch suitors with the wrong type of beak is a _____ type of isolating mechanism.
behavioral
The use of pheromones is a form of _____ isolation.
behavioral
Characteristics of animal genitalia which make mating with other species impossible are forms of _____ isolation.
mechanical
The ability of a plant’s stigma to control which pollen grains can successfully complete pollination is a type of _____ isolation mechanism.
mechanical
Which of the following is a postzygotic isolating mechanism?
hybrid sterility
If a lion and a tiger mate but the offspring is sterile, this is an example of _________.
postzygotic reproductive isolation
Hybrids are typically fertile and the offspring of hybrids are always fertile.
F
Allopatric speciation involves ___________.
a geographic barrier
reproductive isolation
The case of Darwin’s finches on the Galapagos Islands is an example of _________.
adaptive radiation
