Living Environment - January 2011


Base your answers to questions 72 and 73 on the information below and on your knowledge of biology.

A valuable medicine is obtained from a certain rare species of plant. Scientists are anxious to find another more abundant species of plant that is closely related to the rare one, and also produces the medicine. Two newly discovered plant species, A and B, were studied and compared to the rare one. The results of the study are shown in the table

72 Which newly discovered species is more closely related to the rare species? Support
your answer. [1]

73 Which procedure could also be carried out to help determine which newly discovered
species is most closely related to the rare species?

(1) measurement of respiration rate in the plants
(2) chromatography of pigment extracts from the plants
(3) determination of the type of gas released by photosynthesis in the plants
(4) analysis of chemical bonds present in glucose in the plants

74 The characteristics of four finches that inhabit the same island are represented in the
chart below.

Complete the table below using information in the characteristics chart and your
knowledge of biology. [2]

75 Studies of the finches of the Galapagos Islands have shown that

(1) DNA will change to produce structures needed by birds to survive intense
(2) a bird’s beak changes annually in response to the type of food that is most abundant
each year
(3) natural selection occurs when there are scarce resources and intense competition
(4) the beak of a finch will change if the environment of the bird remains stable

Base your answers to questions 76 through 78 on the information below and on your
knowledge of biology.

A student prepared four different red blood cell suspensions, as shown in the chart below.

76 Which suspension would contain red blood cells that would appear wrinkled and
reduced in volume?

(1) A
(2) B
(3) C
(4) D

77 The change in red blood cell volume is principally due to the movement of
(1) serum
(2) oxygen
(3) water
(4) salt

78 Which process is most likely involved in the change in red blood cell volume?
(1) active transport
(2) evaporation
(3) replication
(4) diffusion

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