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Test Description: Practice Test for iLEAP
Instructions: Answer all questions to get your test result.
1) Look at the image on page 19. What color flowers did Mendel discover were produced in the first generation?
A
The flowers were all blue
B
The flowers were all purple
C
The flowers were all pink
D
The flowers were all white
2) Based on the table on page 19, which statement is true?
A
In the first generation, the trait for black fur is masked by the trait for white fur
B
In guinea pigs, the trait for black fur is dominant, and the trait for white fur is recessive
C
Guinea pigs are not true-breeding for fur color.
D
The ratio of a hybrid cross in guinea pigs is about 2:1
3) Explain why Mendel obtained a 3:1 ratio for various traits during his hybrid crosses of pea plants?
A
The first plants were true-breesing plants, resulting in a 3:1 ratio in the first generation breeding
B
The first plants were heterozygous, resulting in a 1:2:1 ratio of traits that result in a 3:1 ratio
C
The first plants were true-breeding plants, resulting in heterozygous plants that then creates a 3:1 ratio
D
The first plants were homozygous recessive plants, resultsing in heterozygous plants results in a 3:1 ratio
4) A cross between a plant with red flowers and a plant with white flowers produces offspring with pink flowers. What is this an example of?
A
codominance
B
dominance
C
incomplete dominance
D
polygenetic dominance
5) Which type of bacteria need oxygen to live?
A
archaea
B
endospore
C
anaerobic
D
aerobic
6) Which of the following is NOT a characteristic of an archaea cell?
A
It has a circular strand of DNA
B
It has a nucleus
C
It has an extreme environment
D
It has a cell wall
7) Which statement is true about viruses?
A
A virus is larger than bacteria and its always the same shape.
B
A virus can replicate on its own.
C
A virus is a strand of RNA or DNA surrounded by a layer of protein.
D
A virus is a living organism that responds to stimuli.
8) After a hypothesis is confirmed, which is the next step a good scientist would take?
A
Design an experiment
B
repeat the test several times
C
modify or revise the hypothesis
D
speak at a science conference
9) Organizing results into a table, graph, or chart is done during which step of a scientific inquiry?
A
communicate results
B
analyze results
C
draw conclusions
D
ask questions
10) Start with 2 identical balloons, a board with 50 nails on it, and a board with a single nail on it. Press a balloon to the single nail and a balloon to the 50 nails. The single nail will pop the balloon and the other will not. Name the variables.
A
independent - force used on balloons, dependent - board used to hold the nails
B
independent - number of nails, dependent - whether the balloon pops or not
C
idependent - number of balloons, dependent - type of nails
D
indepenent - whether the balloon pops or not, dependent - the number of nails
*select an answer for all questions
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