ACTUAL QUESTIONS AND 100% VERIFIED ANSWERS
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A student placed a stone in a gradulated cylinder containing 30cm3 of
water. She then noted that the water level rose to 55cm3 mark. What is
the volume of the stone?
a. 25cm3
b. 30cm3
c. 55cm3
d. 85cm3 - correct answer -A: The stone causes the volume in the
cylinder to increase by 25cm3 (55cm3-30cm3). The volume of a liquid
displaced by a submerged object is equal to the volume of the object
itself. Therefor, the volume of the stone is 25 cm3.
A 36-W lam is operated by a 9-V battery. How many amperes of current
are flowing through the lamp?
a. 0.25 A
b. 4 A
c. 27 A
,d. 45 A - correct answer -B: Power = Voltage x current; 36w = 9v x
current; current = 4a
Which of the following terms are included in the scientific name of an
organism?
a. genus and species
b. phylum and species
c. family and genus
d. kingdom and phylum - correct answer -A: Genus and species make up
the scientific name of an organism.
Which of the following would be classified as an example of connective
tissue?
a. striated muscle
b. epidermis
c. nerve
d. tendon - correct answer -D: Connective tissue binds and supports
other tissues. For example, tendons attach muscle to bone. Muscle is
muscular tissue, epidermis is epithelial tissue, and nerve is nervous
tissue.
,The entry and exit of materials in the animal cell are regulated by which
of these cell organelles?
a. nucleolus
b. cell wall
c. endoplasmic reticulum
d. plasma membrane - correct answer -D: The plasma mermbrasne,
which is make of carbohydrates, lipids and proteins, is selectively
permaeable and regulates traffic into and out of a cell.
Which of the following structures is the functional unit of the human
lung?
a. bronchus
b. Malpighian tubule
c. nephron
d. alveolus - correct answer -D: Alveoli are the functional units of lungs.
The oviduct, or fallopian tube, conveys the released egg to the uterus.
Malpighian tubules are excreatory organs found in insects, and the
nephron is the functional unt of the kidneys.
Which of these substances is an end product of protein digestion?
, a. amino acids
b. lipid
c. fatty acids
d. cholesterol - correct answer -A: Proteins are made up of chains of
amino acids.
If a person's gallbladder were removed by surgery, which of the
following substances would he have the most difficulty digesting?
a. carbohydrates
b. nucleic acids
c. fats
d. proteins - correct answer -C: The gallbladder stores bile, which is the
substance produced by the liver. Bile contains bile salts, which aid in the
digestion and absorption of fats.
Which of the following phenomena is most likely to speed the
evolutionary rate of a species?
a. lack of environmental changes
b. increase in mutations
c. decrease in migration