1. A student view some unicellular freshwater algae under the
microscope. He adds drops of concentrated salty water. He would
expect it to
A. shrivel up and die
B. swell up and burst
C. lose its water and die
D. increase in its
mass
(C)
2. Experimentally, it is found that the rate of metabolism of a
rat is higher than that of an elephant. How can you account for
this experimental finding?
A. Rate of heat loss is directly proportional to body size
B. Structures of small mammals are simpler than that of larger
mammals so the conservation of heat is poor in the former.
C. small mammals have bigger surface area to volume ratio so
more heat is lost.
D.Small mammals, due to their body size, are much less
active. (C)
3. Which of the following statements is true about proteins?
A. They pass easily through cell membranes.
B. Found in all living
cells.
(B)
My answers are written in brackets. Just need to double-check.
Please inform me if there are errors. Appreciate your help!