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What is an example of sympatric speciation?
Anonymous Quiz
0%
A. The migration of polar bears to the Arctic region
25%
B. The adaptation of kangaroos to different habitats within Australia
25%
C. The separation of the Galapagos finches due to geographic barriers
50%
D. The development of new species of cichlid fish in the same African lake
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What role does polyploidy play in the evolution of plants?
Anonymous Quiz
0%
A. It inhibits the formation of new species
10%
B. It restricts the ability of plants to reproduce
80%
C. It enhances genetic diversity and promotes speciation
10%
D. It decreases the adaptability of plants to new environments
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Which of the following represents a prezygotic reproductive isolation mechanism?
Anonymous Quiz
0%
A. Hybrid inviability
92%
B. Mechanical isolation
8%
C. Hybrid breakdown
0%
D. Reduced hybrid fertility
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Which of the following statements about Homo habilis is true?
Anonymous Quiz
33%
A. It is considered the first species to use fire.
13%
B. It had a larger brain size compared to Homo sapiens.
27%
C. It was primarily quadrupedal, similar to chimpanzees.
27%
D. It is believed to be one of the earliest members of the genus Homo.
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When considering primate evolution, which species shares a more recent common ancestor with humans?
Anonymous Quiz
7%
A. Gorillas
87%
B. Chimpanzees
0%
C. Spider monkey
7%
D. Colobus monkeys
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Which percentage of the body's total energy expenditure does the human brain typically account for?
Anonymous Quiz
6%
A. 5%
13%
B. 10%
56%
C. 25%
25%
D. 50%
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What factor contributes to the low likelihood of human races evolving into different species?
Anonymous Quiz
22%
A. Reproductive isolation mechanisms
0%
B. Increased gene flow between populations
33%
C. Reduced genetic variation within racial groups
44%
D. Changes in climate or other environmental factors
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What is the result of a missense mutation?
Anonymous Quiz
17%
A. The DNA sequence is shortened
17%
B. A stop codon is inserted into the sequence
17%
C. No change occurs in the protein sequence
50%
D. A different amino acid is incorporated into the protein
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Which type of mutation involves the addition or deletion of nucleotides in a DNA sequence,causing a shift in the reading frame?
Anonymous Quiz
33%
A. Point mutation
0%
B. Silent mutation
22%
C. Missense mutation
44%
D. Frameshift mutation
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Which of the following conditions is NOT caused by aneuploidy?
Anonymous Quiz
11%
A. Turner syndrome
89%
B. Sickle cell anemia
0%
C. Klinefelter syndrome
0%
D. Edwards syndrome
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What is the chromosome number typically associated with Turner syndrome?
Anonymous Quiz
21%
A. 45, XO
21%
B. 46, XY
43%
C. 48, XXX
14%
D. 47, XY
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What is genetic drift?
Anonymous Quiz
22%
A. A state in which allele frequencies in a population remain constant.
11%
B. A process where alleles are intentionally altered by external factors.
11%
C. A situation in a population where one allele becomes the only existing variant.
56%
D. A mechanism of evolution driven by random fluctuations in allele frequencies.
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What occurs during fixation in genetic drift?
Anonymous Quiz
27%
A. Genetic equilibrium is reached
18%
B. Allele frequencies become stable
36%
C. Alleles are lost from the population
18%
D. The frequency of one allele reaches 100%
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If the frequency of individuals with the genotype AA is 0.36 in a population that is inHardy-Weinberg equilibrium, what is the frequency of individuals with the genotype Aa?
Anonymous Quiz
14%
A. 0.6
29%
B. 0.24
14%
C. 0.48
43%
D. 0.12
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How does gene flow impact allele frequencies within populations?
Anonymous Quiz
17%
A. It increases the frequency of recessive genetic disorders.
0%
B. It causes the complete disappearance of a species from Earth.
58%
C. It introduces new alleles and alters existing allele frequencies.
25%
D. It makes small group of individuals to establish a new population.
In which part of your body can you easily detect your pulse rate?
Anonymous Quiz
20%
Elbow
30%
Wrist
40%
Chest
10%
Stomach
Oxygenated blood leaves the human heart through the
Anonymous Quiz
46%
Pulmonary vein
15%
Pulmonary artery
8%
Vena cava
31%
Aorta
Meiosis is a type of cell division that takes place in:
Anonymous Quiz
79%
Germ cells
14%
Somatic ce
0%
Nerve cells
7%
Muscle cells
Which of the following animals is found in Nechisar National park ?
Anonymous Quiz
20%
Mountain nyala
40%
Crocodile
0%
Walia ibex
40%
Gelada baboon