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 9
Context: A phylogenetic tree shows that species A and B share a more recent common ancestor with each other than with species C. What does this mean about their evolutionary relationships?
Context: A scientist finds that two species have very different adult forms but very similar embryos. What does this suggest about their evolutionary relationship?
Context: Scientists compare the DNA of two species and find that 98% of their DNA is identical. What does this suggest about their evolutionary relationship?
Context: Two species of birds have similar beak shapes but live on different continents and are not closely related. What is the most likely explanation for their similar beaks?
Context: A phylogenetic tree shows that species A and B share a more recent common ancestor with each other than with species C. What does this mean about their evolutionary relationships?
Context: A scientist finds that two species have very different adult forms but very similar embryos. What does this suggest about their evolutionary relationship?
Context: Scientists compare the DNA of two species and find that 98% of their DNA is identical. What does this suggest about their evolutionary relationship?
Context: Two species of birds have similar beak shapes but live on different continents and are not closely related. What is the most likely explanation for their similar beaks?
Which of the following best describes evolutionary relationships? (1) How organisms interact with their environment (2) How organisms are related through common ancestry (3) How organisms compete for resources (4) How organisms reproduce
Which of the following is an example of a vestigial structure? (1) Human appendix (2) Bird beak (3) Fish gills (4) Elephant trunk
Which of the following is an example of divergent evolution? (1) The development of wings in bats and birds (2) The development of different beak shapes in Darwin's finches (3) The development of fins in fish and dolphins (4) The development of similar body shapes in sharks and dolphins
Which of the following is NOT a homologous structure? (1) Whale flipper and human arm (2) Bat wing and human arm (3) Bird wing and butterfly wing (4) Cat leg and human arm
Fill in the blank: Structures that have similar functions but different evolutionary origins are called _______ structures.
Fill in the blank: The branch points on a phylogenetic tree represent _______.
Fill in the blank: The more _______ two species share, the more closely related they are.
Fill in the blank: The process by which one species evolves into two or more different species is called _______.
True or False: All living organisms share a common ancestor.
True or False: All mammals are more closely related to each other than to reptiles.
True or False: All vertebrates have a backbone because they share a common ancestor.
True or False: Analogous structures indicate a close evolutionary relationship.
