NEW
Font size
WorksheetsUnit 7 Evolution Review
Total questions: 34
Worksheet time: 21mins
In Darwin's thinking, the more closely related two different organisms are, the
more similar their habitats are.
less similar their DNA sequences are.
more recently they shared a common ancestor.
less likely they are to have the same genes in common.
more similar they are in size.
During drought years on the Galapagos, small, easily eaten seeds become rare, leaving mostly large, hard-cased seeds that only birds with large beaks can eat. If a drought persists for several years, what should one expect to result from natural selection?
Small birds gaining larger beaks by exercising their mouth parts.
Small birds mutating their beak genes with the result that later-generation offspring have larger beaks.
Small birds anticipating the long drought and eating more to gain weight and, consequently, growing larger beaks.
More small-beaked birds dying than larger-beaked birds. The offspring produced in subsequent generations have a higher percentage of birds with large beaks.
Larger birds eating less so smaller birds can survive.
Structures as different as human arms, bat wings, and dolphin flippers contain many of the same bones, these bones having developed from very similar embryonic tissues. How do biologists interpret these similarities?
By identifying the bones as being analogous
By the principle of convergent evolution
By proposing that humans, bats, and dolphins share a common ancestor
By looking at where the animals live
When we say that an individual organism has a greater fitness than another individual, we specifically mean that the organism
lives longer than others of its species.
competes for resources more successfully than others of its species.
mates more frequently than others of its species.
utilizes resources more efficiently than other species occupying similar niches.
leaves more viable offspring than others of its species.
Which describes an African butterfly species that exists in two strikingly different color patterns?
artificial selection
directional selection
stabilizing selection
disruptive selection
sexual selection
Fossil evidence indicates that horses have gradually increased in size over geologic time. Which of the following terms best describes this?
artificial selection
directional selection
stabilizing selection
disruptive selection
sexual selection
Most Swiss starlings produce four to five eggs in each clutch. Those producing fewer or more than this have reduced fitness. Which of the following terms best describes this?
artificial selection
directional selection
stabilizing selection
disruptive selection
sexual selection
Males of different species of the fruit fly Drosophila that live in the same parts of the Hawaiian islands have different elaborate courtship rituals that involve fighting other males and stylized movements that attract females. What type of reproductive isolation does this represent?
habitat isolation
temporal isolation
behavioral isolation
gametic isolation
postzygotic barriers
All of the following are examples of events that can prevent breeding between species EXCEPT:
The potential mates experience geographical isolation.
The potential mates experience behavioral isolation.
The potential mates have different courtship rituals.
The potential mates have similar breeding seasons.
The gametes of potential mates have biochemical differences.
Homologous structures are often cited as evidence for evolution. All of the following are examples of homologous structures EXCEPT
the wings of a bird and with wings of a bat
the flippers of a whale and the arms of a man
the pectoral fins of a porpoise and the flippers of a seal
the forelegs of an insect and the forelimbs of a dog
the hind legs of a lizard and the legs of a chicken.
All of the following are part of Hardy Weinberg law for populations in equilibirum EXCEPT
Large population
No immigration or emigration
No natural selection
Non random mating
No genetic mutations
