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1)Sometimes, many related species evolve from a single species in a relatively short period of time. This often happens as the ancestral species has the opportunity to adapt to new environmental niches. Which of the following terms is NOT relevant to this process?
A)adaptive radiation
B)cladogenesis
C)divergent evolution
D)All of the terms are relevant.
2)Geographically isolated populations become separate species when
A) they have been separated for ten or more generations.
B)their markings become distinct.
C)they are no longer able to interbreed.
D)their skeletal structures become distinct.
3)According to the biological species concept, the termspecies has been defined as a group of organisms that canbreed with one another in a wild, free-ranging condition to producefertile offspring. For which of the following would this concept bemost difficult to apply?
A)lizards
B)plants
C)sponges
D)B and C
4)Speciation is the process by which new species arise. Speciation does not result from which of the following?
A)geographic isolation
B)reproductive isolation
C)genetic divergence
D)species interbreeding
5)Allopatric speciation is a form of speciation that occurs when populations become geographically isolated from one another. Geographic isolation may occur when
A)continents drift apart.
B)a mountain range separates formerly connected populations.
C)the range of a species is limited by loss of suitable habitat.
D)all of the above
6)Which of the following is an example of adaptive radiation?
A)the 13 different species of finches Darwin found on the Galapagos islands
B)the new species of rhea that was found on the opposite side of the river from the older species of rhea
C)the fact that dogs and coyotes can interbreed to produce fertile offspring
D)the observation that small populations have a greater opportunity for genetic changes
7) Under which of the following conditions does adaptive radiation occur?
A)A population invades an island that contains a number of unexploited niches and variation in environmental conditions.
B)Members of a population are isolated from other members of the population, either by geographic isolation or reproductive isolation.
C)A geographical barrier is removed between two populations that were originally one population.
D)A hybrid of two populations breeds successfully with a member of one of the parent populations.

1.
Hawaiian honeycreepers are a group of birds with similar body shape and size. However, they vary greatly in color and beak shape. Each species occupies its own niche and is adapted to the foods available in its niche. The evolution from a common ancestor to a variety of species is an example of _____.
(1 point)
divergent evolution
cross-pollination
vegetative propagation
convergent evolution
2.
_____ selection favors one extreme form of a trait in a population.
(1 point)
Directional
Stabilizing
Disruptive
Natural
3.
Which answer BEST shows an animal’s adaptation to the tropical rain forest?
(1 point)
camouflage in a tree frog
the long neck of a giraffe
an elephant’s long trunk
migration of birds in winter
4.
Upon close examination of the skeleton of an adult python, a pelvic girdle and leg bones can be observed. These features are an example of _____.
(1 point)
artificial selection
homologous structures
vestigial structures
comparative embryology
5.
Which of the following is not a factor that causes changes in the allelic frequencies of individuals in a population?
(1 point)
stabilizing selection
directional selection
random selection
disruptive selection

1. Hawaiian honey-keepers are a group of birds with similar body shape and size. However, they very greatly in color an beak shape. each species occupies its own niche and is adapted to food available in its niche. The evolution from a common ancestor to a variety of species is an example of:
a. divergent evolution
b. convergent evolution
c. artificial selection
d. inbreeding
2. The flying squirrel of North America closely resembles the flying phalanger of Australia. they are similar is size and have long, bushy tails and skin folds that allow them to glide through the air. The squirrel is a placental mammal while the phalanger is pouched mammal. Their resemblances, even though genetically and geographically separated by huge distances, can best be explained by:
a. divergent evolution
b. convergent evolution
c. artificial selection
d. inbreeding
best answer gets 10 points. if you do not want to help then please do not comment.