Evolution CRCT

1
Evolution CRCT

• Practice Questions

2
(No Transcript)
3
(No Transcript)
4
(No Transcript)
5
(No Transcript)
6
(No Transcript)
7
(No Transcript)
8
(No Transcript)
9
(No Transcript)
10
(No Transcript)
11
(No Transcript)
12
(No Transcript)
13
(No Transcript)
14
   The structures shown below are _____

  a.   vestigial  
  b.   analogous  
  c.   heterologous  
  d.   homologous
15
d. homologous

16

• How do mutations change populations over time?
• Most mutations are harmful and cause species to
  become extinct
• Most mutations cause abnormal disease in species
• Mutations generally have no effect on a
  population since they are simple changes in DNA
• d. Mutation can produce adaptations in
  organisms that help them survive better in their
  environment

17

• D. Mutation can produce adaptations in
  organisms that help them survive better in their
  environment

18
What type of adaptation is shown in below?
Walking stick

•    
• a.  artificial selection 
• b.  Homologous structures
• c.  camouflage  
• d.  mimicry

19
c.  camouflage 

•    
•  

20
Natural selection can best be defined as the
_____.

• a.elimination of the smallest organisms by the
  biggest organisms  
• b.survival and reproduction of the organisms that
  occupy the largest area  
• c.survival of the biggest and strongest organisms
  in a population 
• d.survival and reproduction of the organisms that
  are genetically best adapted to the environment

21

•  
• d. survival and reproduction of the organisms
  that are genetically best adapted to the
  environment

22

• A farmer sprayed his corn crop with an
  herbicide to kill the weeds in his field. Most of
  the weeds died from the herbicide, but a few were
  resistant and survived. The next year, the farmer
  used the same herbicide on his field. This time
  the herbicide did not work as well. The weeds
  seemed to be unaffected. Which best explains this
  situation?
• a. The herbicide caused a mutation in the weeds.
• b. The herbicide caused immunity in the weeds.
• c. A few weeds in the first population were
  immune to the herbicide and passed this trait on
  to the second generation.
• d. The weeds learned to fight off the herbicide.

23

• c. A few weeds in the first population were
  immune to the herbicide and passed this trait on
  to the second generation.

24

• Two individuals are unquestionably members of the
  same species if they
• a. possess the same number of chromosomes. b.
  breed at the same time. c. are phenotypically
  indistinguishable. d. can mate and produce
  fertile offspring e. pass the text of sympatry.

25

• d. can mate and produce fertile offspring

26

• The solidified remains or imprint of a
  previously existing organism is called a
• a. sediment.
• b. layer.
• c. fossil.
• d. mineral.

27

• c. fossil.

28
Why are fossils evidence of evolution?

• A. They show that living organisms have remained
  unchanged throughout time
• B. They provide a history of life on earth
• C. They show what types of DNA organisms had
• D. They show that organisms have adapted to
  extreme environments

29

• B. They provide a history of life on earth

30
Fossils of animals the size of goats were dated
at 5 million years old. Similarly, fossils of
larger animals were dated at 3 million years old.
Both animals were similar in body structure to
today's horses. Using these data, which inference
can scientists make?

• A. The animals were probably ancestors of todays
  horses
• B. The animals had no relationship to one
  another.
• C. Today's horses and these animals probably
  lived together at some time in the past.
• D. Today's horses are faster than these animals
  were.

31

• A. The animals were probably ancestors of todays
  horses

32
One very important mechanism for evolution is
genetic drift, which is the

1. Random change in genes within a population
2. Formation of new species
3. Evolution of two species in response to each
   other
4. Ability of an organism to survive in its
   environment

33

• Random change in genes within a population

34
Fossils are useful in

1. Determining how species have change over time
2. Determining the absolute age of rock layers only
3. Explaining the theory of natural selection
4. Supporting the theory that mutations are not
   always negative.

35

• Determining how species have change over time