2.1 - INTRODUCTION TO BIODIVERSITY Flashcards
Which of the following BEST describes species richness?
a) It is the relative abundance of species.
b) It counts the number of species in an area.
c) It evaluates how similar the population sizes of different species are to each other.
d) It measures the genetic diversity of the population.
A pack of wolves travels across an ice bridge while hunting. The ice bridge melts before the group returns to the mainland and once it reforms the smaller pack can no longer successfully reproduce with the original pack.
Which of the following indicates what type of event has occurred?
a) Allopatric speciation
b) Sympatric speciation
c) Genetic drift
d) Reproductive isolation
Which is the BEST example of convergent evolution?
a) The forelimbs of dogs, birds and whales have different functions but similar bone structures.
b) Darwin’s finches on the Galapagos Islands developed different beaks to take advantage of different food supplies.
c) Dolphins and sharks have torpedo-shaped bodies with streamlined bodies, dorsal fins, pectoral fins and flippers.
d) The Kaibab squirrels live on the North Rim of the Grand Canyon and the Abert squirrels live on the South Rim. They were once the same population but experienced geographical isolation which caused speciation.
