Animal Structures

Which of the following are external structures for an animal?

• Poison glands

• Fur

• Multiple stomachs

• Claws

Answer explanation

The largest claws in the animal kingdom belong to the giant armadillo. They measure nearly 8 inches long!

Which of the following are internal structures for an animal?

• Poison glands

• Fur

• Multiple stomachs

• Claws

Answer explanation

Cane toads have poison glands which produce bufotoxin, one of the most poisonous toxins in the world. The toxin in their skin is so potent it can kill a variety of animals and is particularly dangerous to dogs.

How do spots or stripes help an animal survive?

• Spot or stripes attract mates

• Spots or stripes help animals identify each other

• Spots or stripes help animals camoflague themselves, so they can hide from other kinds of animals.

Answer explanation

Examples of camouflage are mimicry, colour matching, disruptive coloration, countershading, counter illumination, reflection and active camouflage.

The honey badger has thick skin allowing it to ignore bee stings, porcupine quills, and even cobra bites. This thick skin is an example of ...

• External structures

• Internal structures

Answer explanation

Honey badgers are notoriously fearless, eating cobras, raiding beehives, and scaring off lions and hyenas.

All mammals, including humans, have saliva glands. These produce saliva that help us digest our food. Are saliva glands an example of an external or internal structure?

• External structures

• Internal structures

Answer explanation

You could potentially produce enough saliva to fill two bathtubs a year!