BSCS Biology: A Molecular Approach

Chapter 18: Diversity and Variation

Chapter Test

1.
All differences within a species are known as____.
A)diversity
B)variations
C)polymorphisms
D)subspecies
2.
Which of the following is a weakness of the species concept?
A)Males and females of the same species can have different forms.
B)Members of a species can look different based on differences in geographic location.
C)Members of related species might breed in captivity.
D)Some organisms do not reproduce sexually.
3.
What characteristic is commonly used by taxonomists in classifying organisms?
A)color
B)anatomy
C)size
D)age
4.
Structural resemblances between species are called ____ if they arise from shared ancestry.
A)taxologies
B)analogies
C)homologies
D)physiologies
5.
Which taxonomic group has the most types of organisms?
A)phylum
B)order
C)class
D)genus
6.
Scientists have determined that the giant panda belongs in the bear family based on____.
A)the number of mutations in its DNA
B)the number of chromosomes it has
C)the structure of its DNA replication machinery
D)the number of genes it has
7.
Which of the following is a characteristic of species in the kingdom Monera?
A)They contain mitochondria.
B)They reproduce sexually.
C)Most species are unicellular.
D)All species are autotrophs.
8.
Which statement is true of the kingdom Animalia?
A)They have cell walls.
B)Their cells lack a true nucleus.
C)They have very little diversity in form.
D)Most have nervous systems.
9.
Which of the following is characteristic of both the fungi and plantae kingdoms?
A)They reproduce by forming spores.
B)They are decomposers.
C)They have cell walls.
D)They are autotrophs.
10.
Which of the following statements is false?
A)All scientists agree that life should be categorized in 5 kingdoms.
B)Classification systems are helpful to scientists, but they do not exist in the natural world.
C)DNA science is helping scientists learn more about the evolutionary relationships between species.
D)The science of classification changes as biologists gather new data.
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