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module1
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1992-01-01
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205 lines
NEW SET
A
Type the letter of the best answer.
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1
1. Euryphagous protozoans differ from stenophagous protozoans in that:
(A) euryphagous protozoans are likely to be less widely distributed
(B) euryphagous protozoans can live on any of several different kinds
of minute organisms
(C) stenophagous protozoans can live on any of several different kinds
of minute organisms
(D) the number of stenophagous protozoans is not affected by the food
supply
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b
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2
Correct.
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wrong answer explanation
2
(B) A variety of sources is available.
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2
2. Adding ribonuclease to cells would effectively inhibit which one of the
following processes?
(A) protein synthesis
(B) diffusion
(C) catalysis
(D) lipogenesis
(E) none of these
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a
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3
Correct.
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wrong answer explanation
3
(A) Ribonuclease is an enzyme commonly used by scientists to determine the
centers of protein synthesis in a normal cell. It destroys the ribosome,
effectively blocking protein synthesis.
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3
3. The evolutionary development of the animal kingdom can best be
represented as which one of the following?
(A) ladder
(B) web
(C) circle
(D) chain
(E) tree
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e
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4
Correct.
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wrong answer explanation
4
(E) All animals evolved from a common ancestry.
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4
4. Which statement concerning the finches of the Galapagos Islands is
most likely FALSE?
(A) The different species of finches have no common ancestor.
(B) The origin of the various beaks can be traced to mutation.
(C) Isolation was an important factor in the production of the
different species.
(D) Beak modification in each species differs, depending on the diet.
(E) none of these
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a
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5
Correct.
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wrong answer explanation
5
(A) The finches have a common ancestry.
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5
5. The earliest land vertebrates probably most closely resembled:
(A) annelids
(B) reptiles
(C) amphibians
(D) arthropods
(E) birds
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c
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B
Correct.
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wrong answer explanation
B
(C) Amphibians are able to survive on land and in water.
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NEW SET
B
Type the letter of the best answer.
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1
6. Pasteur's investigations proved that:
(A) microorganisms are practically omnipresent
(B) no one had yet observed spontaneous generation
(C) spontaneous generation was impossible
(D) the creation of life was suprahuman
(E) spontaneous generation is possible under certain conditions
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a
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2
Correct.
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wrong answer explanation
2
(A) By employing proper sterile technique (asepsis), Louis Pasteur proved
that tiny microbes are found almost everywhere.
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2
7. In vascular plants, the stele is surrounded by:
(A) collenchyma
(B) meristem
(C) endodermis
(D) phellogen
(E) epidermis
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c
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3
Correct.
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wrong answer explanation
3
(C) The endodermis is a single layer of cells between the vascular cylinder
and cortex. Its function is thought to be the prevention of water loss
from stele to cortex region.
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3
8. The abscission of leaves adapts trees to:
(A) manufacture gibberellins
(B) conserve water
(C) attract insects
(D) grow faster during the cold season
(E) accelerate transpiration rates
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b
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4
Correct.
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wrong answer explanation
4
(B) Loss of leaves enables trees to retain vital fluids throughout the
winter season.
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4
9. An organism that can successfully reproduce without utilizing the
process of meiosis is the:
(A) fruit fly
(B) dog
(C) cat
(D) grasshopper
(E) amoeba
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e
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5
Correct.
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wrong answer explanation
5
(E) Amoebas reproduce by binary fission, an asexual method of reproduction.
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5
10. Of the following hormones, the one that does NOT strongly influence
the level of blood sugar is:
(A) glucagon
(B) intermedin (MSH)
(C) ACTH
(D) thyroxin
(E) insulin
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b
0
C
Correct.
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wrong answer explanation
C
(B) Intermedin controls the pigment production by chromatophores,
particularly in amphibians whose camouflage defense is vital to their
survival.
end