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LSUE Biology 1001 Final questions and answers (1).
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LSUE Biology 1001 Final questions and answers (1).
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LSUE Biology 1001 FinalA mature ovary, specialized as a vessel that houses a protects seeds, is a
A) cotyledon
B) seed coat
C) ovule
D) fruit
E) seed - questions and answersD) fruit
A physical or chemical agent that changes the nucleotide sequence of DNA is called a
A) codon
B) anticodon
C) mutagen
D) terminator
E) transposon - questions and answersC) mutagen
A population of 1,000 birds exists on a small Pacific island. Some of the birds are yellow, a
characteristic determine by a recessive allele. The others are green, a characteristic determined
by a dominant allele. A hurricane on the island kills most of the birds from the population. Only
ten remain, and those birds all have yellow feathers. Which of the following statements is true?
A) All of the choices are correct
B) The ten remaining birds will mate only with each other, and this will contribute to gene flow in
the population
C) Assuming that no new birds come to the island and no mutations occur, future generations of
this population will contain both green and yellow birds
D) The hurricane has caused a population bottleneck and a loss of genetic diversity
E) This situation illustrates the effect of a mutation event - questions and answersD) The
hurricane has caused population bottleneck and a loss genetic diversity
A woman has been trying to conceive for several years, unsuccessfully. At a fertility clinic, they
discover that she has blocked Fallopian tubes. Using modern technologies, some of her eggs
are removed, fertilized with her husband's sperm, and implanted into her uterus. The procedure
is successful, but the couple discovers that their son is color blind and the blood type O. The
woman claims that the child can't be theirs since she has blood type A and her husband has
blood type B. Also, neither parent is color blind, although one grand parent (the woman's father)
is also color blind. As a genetic counselor, you would explain to the parent that
A) the eggs must have been accidentally switched, since the baby's blood type has to match
one of his parents
B) each parent could have contributed one recessive allele, resulting in type O blood
,C) the eggs must have been accidentally switched, since a type A parent and a ty - questions
and answersB) each parent could have contributed one recessive allele, resulting in type O
blood
According to scientist, about what percentage of men currently living in Central Asia may be
descended from the Mongolian ruler Genghis Khan?
A) 4%
B) 8%
C) 25%
D) 40% - questions and answersB) 8%
All of the following affects the distribution of biomes EXCEPT
A) global wind circulation
B) distance above the sea level
C) latitude
D) soil type
E) climate - questions and answers
All the offspring of a cross between a black eyed mendelian and an orange eyed mendelian
have black eyes. What is the expected phenotypic ration of a cross between two orange eye
mendelians?
A) 3 black eye: 1 orange eye
B) 0 black eyed: 1 orange eyed
C) 1 black eyed: 3 orange eyed
D) 1 black eyed: 0 orange eyed - questions and answersB) 0 black eyed: 1 orange eyed
Amniocentesis and chorionic villus sampling allows for ____ and ____ of the fetus so that it can
be tested for abnormalities
A) imaging ...karyotyping
B) sexing.... imaging
C) karyotyping... biochemical testing
D) direct observation.. biochemical testing - questions and answersD) direct observation..
biochemical testing
An organ represents a higher level of structure than the tissue composing it and performs
functions that the tissues cannot perform alone. This is an example of the principle of
A) emergent properties
B) cellular regulation
C) cellular communication
, D) biotechnology
E) structural adaptions - questions and answersA) emergent properties
An organ system consists of
A) a collection of cells and tissues
B) organs that collectively perform a vital body function
C) a collection of similar cells
D) blood, lymph, and the body fluid
E) a group of coordinated tissues - questions and answersB) organs that collectively perform a
vital body function
Aristotle believed that
A) All of the choices are correct
B) An individual's use of a body part causes it to further evolve
C) species are fixed (permanent) and perfect
D) species evolve through natural selection and other mechanisms
E) the best evidence for change within species is seen in fossils - questions and answersC)
species are fixed (permanent) and perfect
Asexual reproduction requires____individuals(s)
A) 0
B) 1
C) 2
D) 3 - questions and answersB) 1
At a chiasma, two____are attached to each other
A) homologous or non sister chromatids
B) homologous or sister chromatids
C) non homologous chromosomes
D) daughter cells - questions and answersA) homologous or non sister chromatids
Bark consists of
A) functioning xylem, secondary phloem, cork cambium, and cork
B) secondary phloem, cork cambium, and cork
C) cork only
D) secondary xylem and cork
E) cork cambium and cork - questions and answersB) secondary phloem, cork cambium, and
cork
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