PTE Reading

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Pearson Test of English — TestDayTwin Practice

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Read the passage and select ALL statements it supports.

Tardigrades, sometimes called water bears, are microscopic animals famous for surviving conditions that would kill almost anything else. When their watery habitat dries out, they do not simply tough it out. Instead, they expel more than ninety percent of the water from their bodies, pull in their legs, and curl into a barrel-shaped form known as a tun. In this state their metabolism nearly stops, and they may persist for years until moisture returns. Protective molecules such as trehalose and special proteins shield their cells from collapse. Once rehydrated, the animal slowly reactivates and resumes ordinary life as though nothing had happened.

According to the passage, which of the following are true of tardigrades? (select all that apply)

They lose the great majority of their body water when entering the tun state.Their metabolism continues at a normal rate while they are in the tun state.Certain molecules help protect their cells during drying.They can remain in the dormant tun form for years before reviving.They die permanently once their habitat dries out.They speed up their metabolism to resist desiccation.