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Question
QuickView
Choices
Curve Question
Difficulty
Psg/Game/S
Difficulty
Explanation
PT117 S2 Q17
+LR
Most strongly supported +MSS
Principle +Princ
Rule-Application +RuleApp
Math +Math
A
10%
158
B
7%
155
C
79%
163
D
4%
156
E
0%
150
135
147
158
+Medium 146.765 +SubsectionMedium

The tiny hummingbird weighs little, but its egg is 15 percent of the adult hummingbird’s weight. The volume and weight of an adult goose are much greater than those of a hummingbird, but a goose’s egg is only about 4 percent of its own weight. An adult ostrich, much larger and heavier than a goose, lays an egg that is only 1.6 percent of its own weight.

Summary
A hummingbird’s egg accounts for 15 percent of an adult hummingbird’s weight. An adult goose is much larger than a hummingbird, but a goose’s egg accounts for only 4 percent of an adult goose’s weight. An adult ostrich is much larger than a goose, but ostrich eggs only account for 1.6 percent of an adult ostrich’s weight.

Strongly Supported Conclusions
The larger a bird species is, the smaller the ratio is between egg weight and the body weight of an adult bird.

A
The eggs of different bird species vary widely in their ratio of volume to weight.
This answer is unsupported. In the stimulus, we are comparing egg weight and volume to the weight and volume of an adult bird. This answer is comparing egg weight and volume of one species compared to the egg weight and volume of another.
B
The smaller and lighter the average adult members of a bird species are, the larger and heavier the eggs of that species are.
This answer is unsupported. From the stimulus, we only know that the ratio between the weight and volume of an egg increases the smaller the adult bird is. This doesn’t mean that the eggs are larger, just that they account for a bigger proportion of an adult’s weight.
C
The ratio of egg weight of a species to body weight of an adult member of that species is smaller for larger birds than for smaller ones.
This answer is strongly supported. This answer accurately captures the comparative difference of proportion between egg weight and volume of different bird species.
D
The size of birds’ eggs varies greatly from species to species but has little effect on the volume and weight of the adult bird.
This answer is unsupported. We don’t know from the stimulus anything about the size of any adult bird’s eggs. Rather, we only know something about the proportion of egg weight and volume compared to an adult bird.
E
Bird species vary more in egg size than they do in average body size and weight.
This answer is unsupported. We don’t know from the stimulus whether bird species vary in egg size at all. We only know that in different species of birds, egg weight and volume accounts for a different proportion of an adult bird’s weight.