How Is That Not Killing You?

How do icefish survive in the extremely cold waters of Antarctica?

• They have thick layers of blubber to keep warm.

• They produce special antifreeze proteins that prevent their blood from freezing.

• They migrate to warmer waters during winter.

• Their bodies are naturally warmer than the surrounding water.

Which of the following is NOT a way woodpeckers protect their brains from injury while pecking?

• They have spongy, thick bone around their brain.

• Their tongues wrap around their skull to absorb shock.

• They have a special fluid that cushions their brain.

• Their hyoid bone helps absorb impact.

What is the purpose of a woodpecker's nictitating membrane?

• To help them grip trees more effectively.

• To protect their eyes from debris and impact.

• To help them hear insects inside the wood.

• To keep their beaks sharp.

How does a mongoose prevent cobra neurotoxins from harming its nervous system?

• It has a thick skin that cobra fangs cannot penetrate.

• It produces an enzyme that breaks down the neurotoxins.

• It has a special sugar chain that blocks the neurotoxins from binding to receptors.

• It has a faster metabolism that quickly processes the venom.