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Life Science
Test Description: MST2
Instructions: Answer all questions to get your test result.
1) Which part of Darwin's theory of evolution may be used to describe the results of when lions prey on antelope?
A
surival of the fittest
B
natural selection
C
variation in species
D
adaptation to environment
2) Which scenario represents the role of a vector in the transmission of a disease?
A
An infected raccoon bites an uninfected dog who contracts rabies.
B
A healthy mother passes protective antibodies to her unborn child.
C
A mother passes a mutated gene to her offspring.
D
A person handles contaminated tissues and later gets a cold.
3) What relationship exists between genes and chromosomes?
A
Genes produce chromosomes which transmit traits from one generation to another.
B
Genes are made up of chromosomes which move from the nucleus to the cytoplasm.
C
Genes and chromosomes produce alleles which determine the phenotype of offspring.
D
Genes are located on chromosomes which are found in the nucleus of cells.
4) Which statement about DNA is true?
A
DNA controls the genotype only in the second and third generations.
B
DNA controls the genotype but not the phenotype of an organism.
C
DNA is made up of genes that carry hereditary information.
D
Different people can have the same copy of DNA in their cells.
5) Which statement describes an adaptation for a desert environment?
A
Mammals have thick layers of fat for insulation and light-colored fur for camouflage.
B
Small mammals are nocturnal to escape the sun's most intense heat.
C
Plants have air spaces in roots and specialized stems for buoyancy.
D
Trees lose their leaves to conserve energy and prevent damage to the tree.
6) Which statement about cells is correct?
A
Cells of all living things are identical.
B
Cells are made up of other cells.
C
All cells come from other cells.
D
All cells have a nucleus and cytoplasm.
7) Which cell function would be affected if a cell's vacuoles were destroyed?
A
diffusion
B
direction of cellular activities
C
storage of wastes and small molecules
D
respiration
8) What relationship exists between a virus and a cell?
A
A cell cannot exist without a virus.
B
A virus needs a host cell to function.
C
A virus is bigger than a cell.
D
A cell needs a virus to obtain energy.
9) Which statement describes the niche of an organism in an ecosystem?
A
A frog spends part of its life in water and part on land.
B
A snake feeds on small rodents in a forest.
C
A pelican is able to fly long distances without stopping.
D
A moth is nocturnal and is attracted to light.
10) Which statement about energy is true?
A
Energy only flows in one direction through an ecosystem.
B
Once an energy source is gone it cannot be renewed.
C
Energy can always be recycled.
D
Energy transfer between trophic levels is efficient.
11) Which statement reflects the greatest concern for the growth of genetically modified crops?
A
High yield crop varieties will reduce the use of fertilizers.
B
Genes for herbicide resistance might be transferred to weeds.
C
The cost of agriculture production will increase.
D
Insect resistant crop varieties might reduce the insect population.
12) Which argument supports the use of genetically engineered vaccines over traditional vaccines?
A
Genetically engineered vaccines provide immunity for a short period of time which requires multiple doses.
B
Genetically engineered vaccines are more effective against unidentified pathogens.
C
Genetically engineered vaccines cost more due to the research and development required.
D
Genetically engineered vaccines may be safer because they do not use live viruses.
13) Which statement explains why, over time, certain antibiotics have become ineffective against certain strains of bacteria?
A
The chemical and physical structure of the bacteria is the same as the structure of the antibiotics.
B
The human body has become resistant to the antibiotics, so a new formula must be developed.
C
Certain strains of bacteria were used in developing the antibiotics, and therefore they are immune to its effects.
D
Some bacteria have developed a resistance to certain antibiotics, which may be passed to future generations.
14) A research group is designing a new strain of yeast that can quickly ferment sugar to produce bio fuels. What will be a benefit of this research program?
A
It will provide an easy way of generating fuel in households.
B
It will reduce people's dependence on renewable fuel sources.
C
It will provide an inexpensive and renewable source to generate fuel.
D
It will increase the use of yeast in producing all types of energy fuels.
15) What is the most likely consequence of increased cellular respiration?
A
more energy available to the cell
B
cell death
C
decreased diffusion
D
increased oxygen released by the cell
16) An article was recently published in a scientific journal regarding cellular respiration. Which accurate statement might be included in the article?
A
The chloroplast is the organelle in which the respiration process takes place.
B
All organisms carry out the respiration process.
C
Respiration captures energy from sunlight to fuel the cell.
D
Respiration is an energy-releasing process used only by animals.
17) Which example is an appropriate adaptation for flight in birds?
A
high protein diet consisting primarily of insects
B
accurate vision and acute hearing
C
rapid response to stimuli such as predators
D
feathers, wings, and hollow bones
18) Thomas has a condition where his body does not produce myelin. Myelin forms an insulating layer around cells and allows stimuli to be transmitted between cells and throughout the body. Which cell type would be affected by Thomas' condition?
A
nerve
B
bone
C
muscle
D
blood
19) Which statement best explains why viruses are considered parasites?
A
They are specific and can only infect one type of cell.
B
They harm the cells they enter.
C
They are unable to be destroyed by antibiotics.
D
They are nonliving and microscopic.
20) Black fur in mice (B) is dominant to brown fur (b). What is the probability that an offspring will have the same phenotype as its parents in a cross between a homozygous black and a heterozygous black mouse?
A
50%
B
100%
C
0%
D
75%
*select an answer for all questions
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