Q 01/05

What is the skeleton of a shark primarily made of?

A) Bone

B) Cartilage

C) Ligament

D) Keratin

Answer · why

B) Cartilage

Cartilage, the same gristly tissue as in human ears and nose tips, is much lighter than bone, which helps a shark stay buoyant.

Q 02/05

How many gill slits do most shark species typically have on each side of their head?

A) 5

B) 3

C) 7

D) 9

Answer · why

A) 5

While some species like the sevengill shark have more, the majority of shark species possess five gill slits on each side of their head.

Q 03/05

Which shark sense organs detect the electrical fields generated by prey's muscle contractions?

A) Ampullae of Lorenzini

B) Taste buds

C) Semicircular canals

D) Olfactory rosettes

Answer · why

A) Ampullae of Lorenzini

Ampullae of Lorenzini are jelly-filled pores around the snout, sensitive enough to find prey lying hidden under the sand.

Q 04/05

Which term describes shark species that lay eggs, often in leathery cases, outside the mother's body?

A) Viviparous

B) Ovoviviparous

C) Oviparous

D) Parthenogenetic

Answer · why

C) Oviparous

Oviparous sharks, such as horn sharks, lay eggs that develop and hatch externally, often protected by tough egg cases commonly called 'mermaid's purse...

Q 05/05

What does the whale shark, the largest fish in the sea, mainly eat?

A) Plankton and krill

B) Seals and sea lions

C) Large squid

D) Sea turtles

Answer · why

A) Plankton and krill

Plankton and krill are strained from the water by the whale shark, which can also hang upright and open its mouth so that food-rich water rushes in.