Plant Evolution

Answer choices

1. A

   Bad Match2% picked this

   Electrical power for the operation of devices such as lights and medical instruments is essential to the proper functioning of hospitals; generators are often

   Generators are a back-up plan for achieving the core functioning of supplying electrical power to a hospital. The hospital usually gets its power from the local power grid (presumably), which would play the role of Primary. The generators, the Secondary substances, are used when the grid is down. In plants, are secondary substances things that take over the normal functioning when primary substances are unavailable? No, secondary substances are never handling the core functioning of growth and metabolism.

   2%
2. B

   Correct75% picked this

   Mechanical components such as engines and transmissions are necessary for automobiles to run; features such as paint and taillights give a car its distinctive

   Why this is right

   This gives us the innards vs. the outer stuff, the core components vs. the bells and whistles. Engines/transmissions are the Primary substances that deal with core functioning. Paint/taillights are the Secondary substances (the bells and whistles) that give the car its signature appearance. But they have nothing to do with the core functioning of the car.

   Skill tested: Analogy · how this choice captures the passage's function is the move to repeat next time.

   75%
3. C

   Bad Match19% picked this

   Mechanical components such as gears and rotors are required for the operation of clothing factories; electrical components such as wires and transformers supply the

   The contrast here between gears/rotors and wires/transformers is one of being directly related to the core functioning vs. being indirectly related to core functioning. The wires/transformers (the Secondary substances) provide the raw material that powers the gears/rotors (the Primary substances). While this partially works by making one thing seem less connected to core functioning than the other, Secondary substances in plants aren't at all connected to the core functioning of growth and metabolism. In this answer, without wires and transformers those gears and rotors wouldn't work. Meanwhile, without Secondary substances the Primary substances would be totally fine in terms of making the plant 'work'.

   19%
4. D

   Bad Match3% picked this

   Some type of braking system is necessary for trains to be able to decelerate and stop; such systems comprise both friction components that directly

   In this answer, the things potentially playing the role of Primary (friction components) and Secondary (pneumatic components) are both cooperatively involved in the core functioning of the braking system. But in plants, secondary substances are not combining with primary substances to accomplish the same task. They are assigned to completely different roles: PRIMARY: make plant grow / photosynthesize SECONDARY: give plant a certain smell / taste

   3%
5. E

   Bad Match2% picked this

   Specially designed word processing programs are necessary for computers to be able to function as word processors; such programs can be stored either in

   The distinction presented here is whether a useful thing will be stored internally (saved on the computer's internal hard drive) or stored externally (on disks that can be inserted or removed). That doesn't apply at all to Primary and Secondary, both of which are internal substances to the plant but have different roles. And whether a word processing program is saved on the hard drive or on a disk, it's still playing the same role (allowing the user to use their computer like a word processor).

   2%