Evolutionary Relationships
Biology ⇒ Evolution and Diversity
Evolutionary Relationships starts at 9 and continues till grade 12.
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See sample questions for grade 10
A scientist finds that two species of birds have a 98% similarity in their DNA sequences. What does this suggest about their evolutionary relationship?
Describe how biogeography provides evidence for evolution.
Describe how embryological evidence can support evolutionary relationships.
Describe how fossil records can be used to determine evolutionary relationships.
Describe the difference between a monophyletic and a polyphyletic group.
Explain the difference between homologous and analogous structures.
Explain the role of mutations in evolutionary relationships.
A scientist finds that two species of birds have a 98% similarity in their DNA sequences. What does this suggest about their evolutionary relationship?
Which of the following best defines a common ancestor?
(1) An organism that is extinct
(2) An organism from which two or more species have evolved
(3) The most recent living species
(4) A species with the largest population
Which of the following best describes a phylogenetic tree?
(1) A diagram showing the feeding relationships among organisms
(2) A diagram showing evolutionary relationships among species
(3) A chart of animal habitats
(4) A timeline of Earth's history
Which of the following is an example of a homologous structure?
(1) The wings of a butterfly and a bat
(2) The flippers of a whale and the arms of a human
(3) The fins of a fish and the wings of a bird
(4) The eyes of a squid and a human
Which of the following is an example of convergent evolution?
(1) The development of wings in bats and birds
(2) The presence of a backbone in fish and mammals
(3) The similar forelimb bones in whales and humans
(4) The presence of fur in cats and dogs
Fill in the blank: Structures that have similar functions but different evolutionary origins are called __________ structures.
Fill in the blank: The branch point on a phylogenetic tree represents a __________ event.
Fill in the blank: The evolutionary history of a species or group of species is called its __________.
Fill in the blank: The more similar the DNA sequences of two species, the more __________ they are.
True or False: All members of a genus are more closely related to each other than to members of other genera.
True or False: All species within a family are more closely related to each other than to species in other families.
True or False: Convergent evolution results in analogous structures.
True or False: Evolutionary relationships can only be determined by studying living organisms.
