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Fall Semester Exam
Test Description: Fall Semester Exam 2008-2009
Instructions: Answer all questions to get your test result.
1) A star is born when
A
nuclear fusion starts
B
a protostar begins to cool
C
a nebula expands
D
helium and oxygen combine
2) A geneticist uses pedigrees to
A
replicate DNA
B
create genetic crosses
C
prove that sex linked traits are caused by dominant alleles
D
trace the inheritance of traits through generations of families
3) Waves are classified according to
A
their size
B
their shape
C
how they travel
D
their source
4) What happens during meiosis?
A
chromosome pairs separate to form new sex cells
B
each sex cell loses half of its chromosomes
C
each sex cell copies itself to form four new chromosomes
D
chromosome pairs remain together when new sex cells are formed
5) Down syndrome occurs most often when
A
chromosomes fail to separate properly during meiosis
B
sickle shaped cells become stuck in blood vessels
C
a person inherits a recessive allele
D
blood fails to clot properly
6) In which direction(s) do seismic waves travel from their point of origin?
A
in all directions
B
north to south only
C
toward Earth\'s core only
D
toward the equator only
7) At the full moon, the combined gravitational pulls of the sun and moon produce the biggest difference between low and hight tide, called
A
spring tide
B
surface current
C
rip current
D
neap tide
8) Why are sex linked traits more common in males than in females?
A
all alleles on X chromosomes are dominant
B
all alleles on the Y chromosome are recessive
C
a recessive allele on the X chromosome will produce the trait in a male
D
any allele on the Y chromosomee will be codominant with the matching allele on the X chromosome
9) One piece of evidence that supports the big bang theory is the observation that most galaxies are moving
A
in random
B
away from one another
C
toward our galaxy
D
toward one another
10) Stars are classified according to their
A
distance, size, color
B
color, brightness, temperature
C
size, distance, brightness
D
size, brightness, temperature
*select an answer for all questions
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