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Ecosystems
Unit 1: Natural Selection
Pre-Test
Teachers’ Edition
1.
Natural selection is primarily driven by
– B)
A.
B.
C.
D.
E.
2.
3.
. (Objective 1; answer – C)
predators
prey
species
plants not animals
animals not plants
A specific portion of a habitat that is well-suited for a particular species is called
a(n)
. (Objective 1; answer – D)
A.
B.
C.
D.
E.
4.
genetic flaws in species
environmental change
extinction of species
stability of the environment
choices made by individuals of a species
Natural selection mainly involves
A.
B.
C.
D.
E.
. (Objective 1; answer
biosphere
ecosystem
herd
niche
population
Natural selection generally occurs
– B)
A.
B.
C.
D.
E.
. (Objective 1; answer
with decreases in temperature
as a result of cataclysmic changes in the environment
due to identical adjustments in the genes of an entire population
as species improve their environment
only in aquatic environments
5.
By studying the fossil record, scientist have some idea that
. (Objective 2; answer – B)
A.
B.
C.
D.
E.
6.
Which of the following statements concerning natural selection is true? (Objective
2; answer – C)
A.
B.
C.
D.
E.
7.
largest
simplest
most complex
smallest
strongest
Reproduction is essential for species survival in that it allows for
. (Objective 2; answer – A)
A.
B.
C.
D.
E.
9.
Predators do not play a role in natural selection.
Niches are the only thing that do not change in the environment
Competition for food results in natural selection
A stable environment is essential for natural selection
Diseases are not a part of natural selection
In general, the species that has the best chance for survival are the
. (Objective 2; answer – B)
A.
B.
C.
D.
E.
8.
life is more diverse now than it has ever been
more species are extinct than alive today
no species has survived for more than 1000 years
new species are evolving every day
niches are the same today as they were 100,000 years ago
a species to populate its niche
more food to be gathered for the species
new species to develop from cross-breeding two different species
individuals to change species if their niche changes
species to alter their niche to exclude other species
Humans most often impact natural selection by
answer – B)
A.
B.
C.
D.
E.
introduction of new genes into existing species
destruction of niches
altering species to fit into niches
removing threats from the environment
improving animals’ food supply
. (Objective 3;
10.
Hybrid plants are produced because
A.
B.
C.
D.
E.
11.
hybrids produce more offspring
they have more desirable characteristics
they are more susceptible to environmental change
hybrids can alter their niches
hybrids are immune to natural selection
In recent years, the primary driving force in the extinction of a species is
. (Objective 3; answer – A)
A.
B.
C.
D.
E.
12.
. (Objective 3; answer – B)
human intervention
natural disasters
development of new species through mutation
introduction of new species through genetic engineering
poor nutrition
Which of the following examples are ways in which humans interfere in natural
selection? (Objective 3; answer – A)
A.
B.
C.
D.
E.
Developing domesticated animal species
Eruption of volcanoes, leading to increased dust in the atmosphere
Asteroid impacts, decreasing the temperature of the Earth
Alteration of the amount of radioactive carbon in the air
Studying the fossil record