The student wants to emphasise the extreme conditions tardigrades can survive by giving a specific example. Which choice most effectively uses relevant information from the notes to accomplish this goal?

Question

While researching a topic, a student has taken the following notes:
- Tardigrades are microscopic animals less than a millimetre long.
- They can survive extreme heat, cold, pressure and radiation.
- In 2007, a group of tardigrades was exposed to the vacuum of space for ten days.
- Many of them survived and later reproduced normally.

Accepted Answer

A. Tardigrades can survive extreme conditions: in 2007, a group exposed to the vacuum of space for ten days not only survived but later reproduced normally.. The goal has two parts — the extremity of what tardigrades survive, and a specific example. Choice A states the general ability and then gives the space exposure as the concrete case.

Answer

B. Tardigrades are microscopic animals less than a millimetre long. — Size is not an extreme condition, and there's no example.

Answer

C. Tardigrades were the subject of a study in 2007. — This mentions the study but leaves out what happened in it, so it neither shows extremity nor serves as an example.

Answer

D. Extreme conditions include heat, cold, pressure and radiation. — This lists conditions in general without saying tardigrades survive them, and without a specific example.

Expression of Ideas practice question

Answer: A. Tardigrades can survive extreme conditions: in 2007, a group exposed to the vacuum of space for ten days not only survived but later reproduced normally.

Why the other answers are wrong

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