Sharks 101 | National Geographic

What is the approximate length of a whale shark?

• 10 feet

• 20 feet

• 40 feet

• 80 feet

How many teeth can some shark species shed throughout their lives?

• Over 1,000

• Over 5,000

• Over 10,000

• Over 30,000

What feature helps sharks swim quickly by reducing friction?

• Large fins

• Cartilage skeletons

• Dermal denticles

• Torpedo-shaped heads

What are the two main ways sharks reproduce?

• Laying eggs or cloning

• Bearing live young or budding

• Laying eggs or bearing live young

• Bearing live young or splitting