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cbrd44
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module4
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1992-01-01
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208 lines
NEW SET
A
Each question has a statement (S) and a reason (R). Indicate whether:
(A) both S and R are true, and R correctly explains S
(B) both S and R are true, but R does NOT correctly explain S
(C) S is true but R is false
(D) S is false but R is true
(E) both S and R are false
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1
1. Oxygen enters the blood BECAUSE there is higher partial pressure of
oxygen in the lungs than in the blood.
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a
0
2
Correct.
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wrong answer explanation
2
(A) Increased pressure in the air sacs, as a result of inhaling, forces the
oxygen into the bloodstream.
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2
2. There is no pumping of blood in the capillaries BECAUSE blood is pushed
by the force of the blood behind.
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a
0
3
Correct.
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wrong answer explanation
3
(A) The wall of the capillary is only one cell thick and would not withstand
the pressure of blood against it.
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3
3. Pneumonia germs are easily destroyed by subjecting them to boiling water
for 20 minutes BECAUSE pneumonia diplococci are surrounded by
heat-resistant capsules.
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d
0
4
Correct.
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wrong answer explanation
4
(D) Pneumonia germs must be autoclaved.
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4
4. Mimosa leaves droop when struck by a pencil BECAUSE positive
thigmotropism is responsible for this reaction.
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c
0
5
Correct.
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wrong answer explanation
5
(C) The drooping of mimosa is called negative thigmotropism.
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5
5. The egg determines the sex of humans BECAUSE it may carry either the
X or the Y chromosome.
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e
0
B
Correct.
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wrong answer explanation
B
(E) The sperm determines the offspring's sex. The egg always carries the X
chromosome.
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NEW SET
B
Each question has a statement (S) and a reason (R). Indicate whether:
(A) both S and R are true, and R correctly explains S
(B) both S and R are true, but R does NOT correctly explain S
(C) S is true but R is false
(D) S is false but R is true
(E) both S and R are false
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1
6. DIABETES MELLITUS causes urine to smell sweet if no insulin is used
BECAUSE diabetics need insulin to enable their cells to properly
absorb glucose from the blood.
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a
0
2
Correct.
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wrong answer explanation
2
(A) Both statements are true.
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2
7. A lack of phosphorus makes bacteria stop reproducing mitotically BECAUSE
phosphorus is an essential component of DNA.
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a
0
3
Correct.
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wrong answer explanation
3
(A) The absence of phosphorus will prevent replication and stop growth.
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3
8. Double fertilization occurs in the ovule of corn BECAUSE the corn
endosperm is triploid.
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b
0
4
Correct.
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wrong answer explanation
4
(B) Double fertilization occurs in all flowering plants, whether they are
diploid, triploid, or polyploid.
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4
9. Respiration occurs differently in plants and animals BECAUSE plants,
but not animals, have chloroplasts.
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d
0
C
Correct.
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wrong answer explanation
C
(D) Respiration is identical in all organisms that are able to perform it.
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NEW SET
C
Type the letter of the best answer.
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1
10. A pupil would have the best chance of discovering a mutant if he or she
worked with:
(A) cattle
(B) garden peas
(C) fruit flies
(D) guinea pigs
(E) human beings
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c
0
2
Correct.
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wrong answer explanation
2
(C) When experimenting with genetic ratios and possibilities, it is
desirable to use organisms that are prolific breeders. The fruit fly
exhibits this trait.
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2
11. Artificial parthenogenesis occurs by the development of an egg
that is:
(A) fertilized before treatment with chemicals
(B) fertilized after treatment with chemicals
(C) fertilized and implanted in the uterus of an experimental animal
(D) unfertilized but has been treated by chemical or physical methods
(E) fertilized and kept at the proper temperature before and after
treatment with chemicals
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d
0
3
Correct.
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wrong answer explanation
3
(D) Only unfertilized eggs can be used.
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3
12. Which is the best procedure for an overweight teen wishing to reduce?
(A) Fast completely 1 day a week but drink plenty of water.
(B) Continue to eat all foods except desserts and bread.
(C) Use a 900-calorie liquid diet to lose the desired number of pounds;
then return to old eating habits.
(D) Consult a physician to obtain a balanced diet.
(E) Undergo a strenuous physical exercise program.
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d
0
D
Correct.
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wrong answer explanation
D
(D) Good medical advice is important.
end