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16 Cards in this Set
- Front
- Back
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Which biological molecule contains a large amount of the element nitrogen?
a. lipids. b. protiens. c. carbohydrates. d. nucleic acid. |
b. proteins.
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An animal with thick layers of blubber, dense fur, the tendency to hibernate, and light coloration is well-adapted to the _____________biome.
a. tundra. b. grassland. c. chapparal. d. temperate forest. |
a. tundra.
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A change in the natural sequence of bases in DNA structure is called a
a. mutation. b. reconstruction. c. revolution. d. translocation. |
a. mutation.
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Why is the increase in atmospheric carbon dioxide dangerous?
a. The gas inhibits the escape of heat from Earth’s atmosphere. b. Carbon dioxide inhibits rainfall causing long droughts. c. The gas prevents plants from photosynthesizing. d. Carbon dioxide is highly toxic if inhaled. |
a. The gas inhibits the escape of heat from Earth’s atmosphere.
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Ecologists will often represent the amount of potential food available for each trophic level in an ecosystem with a(n)
a. food web. b. biomass pyramid. c. energy flowchart. d. pyramid of numbers. |
b. biomass pyramid.
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Plants need nitrogen in order to survive. The problem is they cannot take in the atmospheric nitrogen, but instead must rely on a certain class of bacteria that are able to turn atmospheric nitrogen into other nitrogen compounds, such as ammonia and nitrates. What is the name of this process?
a. nitrification. b. photo-oxidaiton. c. nitrogen fixation. d. nitrogen absorbtion. |
c. nitrogen fixation.
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DNA fingerprinting would most likely be used to
a. identify human age and lifespan. b. determine genetic relationships. c. diagnose different types of cancer. d. create genetically-identical species. |
d. determine genetic relationships.
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Which group of organisms produces energy from sunlight and is also known as blue-green algae?
a. chemoautotrophs. b. cyanobacteria. c. methanogens. d. spirochaetes. |
b. cyanobacteria.
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In an experiment to study the effect of proteases on proteins, what is the MOST LIKELY effect of a major change in pH?
a. increased rate of product formation. b. a change in the substrate concentration. c. the formation of new active sites of the enzyme. d. a change in shape of the active sites of the enzyme. |
d. a change in shape of the active sites of the enzyme.
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Which technique would be the most useful in determining the father of a child in a paternity suit?
a. DNA finger printing. b. karyotype of father and child. c. polymerase chain reaction (PCR). d. computer-generated parental Punnett square. |
c. polymerase chain reaction (PCR).
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Natural selection can lead to the formation of a new species which is called
a. fitness. b. mutations. c. selection. d. speciation. |
d. speciation.
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In 1950's, Stanley Miller and Harold Urey showed how organic molecules necessary for the formation of life could be assembled from simple molecules known to have existed on Earth millions of years ago.
Evidence from Miller and Urey's experiments suggest that complex organic molecules could be formed from other, simpler molecules. Why is it unlikely that this process is still occuring today? a. Modern amino acids are unlike those that may have existed on the ancient Earth. b. The current environment of the Earth is too polluted to allow the formation of organic molecules. c. The present day Earth lacks sufficient energy to allow the formation of organic molecules to occur. d. Living organisms such as bacteria are likely to interfere in the process by breaking down the organic molecules. |
d. Living organisms such as bacteria are likely to interfere in the process by breaking down the organic molecules.
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All of the statements EXCEPT one are true about mutations. Which statement is false?
a. Mutations must be present in parents and then passed to offspring. b. Mutations can be positive and produce organisms with improved traits. c. Mutations can be fatal to the organism that has a mutation, if the mutation is in a critical gene. d. Mutations can be silent, and not affect the organism that has them, if the mutation is in a non-critical area. |
a. Mutations must be present in parents and then passed to offspring.
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Proper handling of a compound light microscope includes all of these procedures with the EXCEPTION of
a. turning the fine adjustment to raise the body tube. b. cleaning the objective lens and eye piece with lens paper. c. placing the scope on the lab bench with the arm facing you. d. carrying the scope with one hand on the arm, the other on the base. |
a. turning the fine adjustment to raise the body tube.
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Which of these is a gymnosperm?
a. mushroom b. oak tree c. pea plant d. pine tree |
d. pine tree.
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The kingdom, Protista, includes
a. most viral agents. b. prokaryotic organisms. c. yeasts and bread molds. d. most single-celled eukaryotes. |
d. most single-celled eukaryotes.
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