Q 01/05

Which sensory organs let sharks detect the weak electric fields given off by other animals?

A) Otolith organs

B) Lateral line canals

C) Olfactory lamellae

D) Ampullae of Lorenzini

Answer · why

D) Ampullae of Lorenzini

Ampullae of Lorenzini open as small dark pores around the snout and lead to jelly-filled canals that pick up the faint electricity of a prey animal's ...

Q 02/05

Roughly how long do scientists estimate a Greenland shark can live?

A) About 4 years

B) About 40 years

C) About 400 years

D) About 4,000 years

Answer · why

C) About 400 years

About 400 years: carbon-dating proteins in the eye lens put one five-metre female at 272 to 512 years old, so even the low figure makes the Greenland ...

Q 03/05

What is the primary material that makes up a shark's skeleton?

A) Bone

B) Keratin

C) Ligament

D) Cartilage

Answer · why

D) Cartilage

Cartilage, the same gristly tissue as the tip of a human nose, is about half as dense as bone, so a shark's skeleton is light and helps keep it from s...

Q 04/05

What term describes sharks that lay eggs?

A) Viviparous

B) Ovoviviparous

C) Oviparous

D) Parthenogenetic

Answer · why

C) Oviparous

Oviparous sharks lay their eggs in tough protective cases and then leave them; the embryo lives on its yolk and hatches with no parental care at all.

Q 05/05

What is a baby shark called?

A) Cub

B) Calf

C) Pup

D) Kit

Answer · why

C) Pup

Pup is the name for a young shark, whether it hatches from a leathery egg case or is born live, as the young of many species are after hatching inside...