Living Environment - June 2011

Part B–1

31 The bar graph below shows the height of a plant at the end of each week of a five-week growth period.

Which statement represents a valid conclusion based on the information in the graph?

(1) The plant was given water during the first three weeks, only.
(2) The plant will grow faster during the sixth week than it did during the fifth week.
(3) The plant grew fastest during the first three weeks, and then it grew slower.
(4) The plant grew slowest during the first three weeks, and then it grew faster.

32 A diagram frequently used in ecological studies is shown below.

This diagram can be used to represent the

(1) dependency of animal survival on physical conditions in an ecosystem
(2) loss of energy from various groups of organisms in an ecosystem
(3) competition among species in an ecosystem
(4) mechanisms that maintain homeostasis in the plants in an ecosystem.

33 A biologist formulates a hypothesis, performs experiments to test his hypothesis, makes careful observations, and keeps accurate records of his findings. In order to complete this process, the
biologist should

(1) adjust the data to support the hypothesis
(2) eliminate data that do not support the hypothesis
(3) write a research paper explaining his theories before performing his experiments, in order to gain funding sources
(4) evaluate the findings and, if necessary, alter the hypothesis based on his findings, and test the new hypothesis.

Base your answer to question 34 on the diagram below and on your knowledge of biology.

34 Structure X most likely functions in the

(1) transport of chemical messenger molecules into the cell nucleus
(2) extraction of energy from nutrients
(3) separation of cell contents from the outside environment
(4) digestion of large molecules

35 The arrows in the diagram below represent the movement of materials.

This movement of materials indicated by the arrows is most directly involved in the processes of

(1) respiration and replication
(2) photosynthesis and excretion
(3) digestion and recycling
(4) circulation and coordination

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