Problem
Jane has five coins totaling 35 cents. Each coin is either a penny, a nickel, a dime, or a quarter. After using two of the coins ...
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So What?
You'll probably see at least one question involving prime numbers.
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ACT: Science Question #8 |
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Passage 2
During incubation, a bird embryo, like a mammal embryo, uses oxygen to satisfy its energy needs. However, unlike a mammal embryo, a bird embryo cannot rely on its mother to supply the necessary oxygen. The oxygen must be supplied directly from the outside environment by diffusion through pores in the egg's shell. Diffusion is the movement of substances through a membrane from a region of higher concentration to a region of lower concentration.
Based on this fact, a group of scientists suspected that there might be a relationship between the mass of an egg and its total pore area. A pore is a channel through which substances can diffuse from one side of the membrane to the other.
To investigate this concept, the scientists collected the data shown in the table in Table 1.
Question:
Which of the following conclusions can be drawn from the data?
Choices:
The correct answer is B.
In general, as the eggs get heavier, the pore
area rises. This is characteristic of a direct relationship between two
factors. So (B) is a safe conclusion, and for the same reason, (A) has
it backwards. For the relationship to be inverse, smaller eggs would
have more pore area, and that's not the case. (C) is wrong because there
is a relationship here. (D) is wrong because this data concerns egg
size, not bird size, and in any case, it wouldn't make sense that
smaller birds have larger eggs.
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