Multiple choice

Why have cockroaches adapted themselves to tracheal respiration?

  1. To consume more oxygen

  2. To conserve water

  3. To conserve CO2

  4. Steady flight in the air
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cockroaches have adapted to tracheal breathing in order to conserve water. Tracheae do not just carry air inwards to the cells, they also carry water out of the cells. The hypothesis is that when cockroaches are resting and have a lower oxygen requirement, they close the spiracles in order to conserve water.

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