home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
800 College Boards
/
800 College Boards.iso
/
cbrd43
/
module3
< prev
next >
Wrap
Text File
|
1992-01-01
|
4KB
|
187 lines
NEW SET
A
Type the letter of the best answer.
next
1
1. "During and immediately following a war there is a significant
increase in the proportion of boy babies born." This statement:
(A) has not been proven to be valid
(B) is true only in those areas where the diet is deficient
in vitamins
(C) shows nature's way of maintaining a balanced population
(D) is true only for the victorious nations
(E) has been true for European nations
next
a
0
2
Correct.
next
wrong answer explanation
2
(A) Genetic research indicates that the sex ratio remains 50:50.
next
2
2. Occasionally, in cases of obesity, a doctor may prescribe the use
of thyroid extract along with a diet. Such treatment will cause
a reduction in weight because the extract:
(A) increases the rate of general metabolism
(B) increases the activity of the thyroid gland
(C) decreases the patient's appetite
(D) takes the place of starchy foods
(E) serves as a substitute for food
next
a
0
3
Correct.
next
wrong answer explanation
3
(A) Thyroxin speeds up the oxidation or metabolic rate.
next
3
3. Under natural conditions large quantities of organic matter decay
after each year's plant growth has been completed. As a result
of such conditions:
(A) many animals are deprived of adequate food supplies
(B) soil erosion is accelerated
(C) soils soon become exhausted if not fertilized
(D) soils maintain their fertility
(E) earthworms are added to the soil
next
d
0
4
Correct.
next
wrong answer explanation
4
(D) Organic matter contained in the topsoil restores natural minerals.
next
4
4. Many types of marsupials populate the continent of Australia
because it:
(A) has a greater temperature range than other continents
(B) is geographically isolated from other continents
(C) is in the Southern Hemisphere
(D) has a greater variation of altitude than other countries
(E) has an abundant food supply
next
b
0
5
Correct.
next
wrong answer explanation
5
(B) Australia has many unusual and rare animals found no place else in the
world.
next
5
5. Each cell in the body is surrounded by an interstitial fluid. The
most reasonable inference that can be drawn from this fact is that:
(A) cells can live in plain water
(B) life may have begun in the sea
(C) liquid food is the best
(D) interstitial fluid is identical to sea water
(E) interstitial fluid contains diffusable substances
next
b
0
B
Correct.
next
wrong answer explanation
B
(B) Diffusable substances pass from the plasma to the interstitial fluid,
and finally to the cell proper.
next
NEW SET
B
Type the letter of the best answer.
next
1
6. Which of the following does NOT belong with the others?
(A) bat
(B) whale
(C) horse
(D) alligator
(E) rabbit
next
d
0
2
Correct.
next
wrong answer explanation
2
(D) The bat, whale, horse, and rabbit are all members of the order Mammalia.
Only the alligator is a reptile.
next
2
7. A student tossed two pennies from a container 100 times and recorded
these results: both heads, 25; one head and one tail, 47; both tails,
28. Which cross between plants would result in about the same ratio?
(A) Aa x AA
(B) Aa x Aa
(C) AA x aa
(D) Aa x aa
next
b
0
3
Correct.
next
wrong answer explanation
3
(B) The results approximate a 1:2:1 ratio that illustrates the
genotypic ratio of Mendel's law of segregation.
next
3
8. A 3:1 ratio results when a hybrid tall plant is crossed with a
plant that is:
(A) pure dwarf
(B) pure tall
(C) hybrid dwarf
(D) hybrid tall
(E) pure hybrid tall
next
d
0
4
Correct.
next
wrong answer explanation
4
(D) Tallness in plants is dominant to dwarfness.
next
4
9. Probably the most likely reason why dinosaurs became extinct was
that they:
(A) were killed by erupting volcanoes
(B) were eaten as adults by the advancing mammalian groups
(C) failed to adapt to a changing environment
(D) killed each other in combat
(E) were destroyed by powerful cavemen
next
c
0
C
Correct.
next
wrong answer explanation
C
(C) As the climate of the Mesozoic era became colder and more severe, these
giant reptiles did not acquire the mutations needed for survival.
end