First 15 of shark

Who is the main presenter of the "Intro to Sharks Webinar"?

• Jennifer Hammonds

• Jillian Morris

• A representative from Eco-Schools US

• A representative from National Wildlife Federation

What is Jillian Morris's primary profession mentioned in the webinar?

• Documentary Filmmaker

• Marine Biologist

• Oceanographer

• Environmental Activist

Approximately how many different species of sharks are known to exist?

• Over 100

• Exactly 250

• Over 500

• Less than 50

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

• Bones

• Cartilage

• Calcium

• Keratin

How would you describe the texture of a shark's skin?

• Smooth and slimy

• Rough like sandpaper

• Soft and rubbery

• Scaly and slippery

What feature of a shark's skin helps it move efficiently through water and can indicate its speed?

• Smooth scales

• Flexible fins

• Dermal denticles

• Streamlined body shape

What is a key difference in reproduction between some sharks and most bony fish?

• Sharks lay thousands of eggs externally.

• Sharks only reproduce through cloning.

• Some sharks give birth to live young.

• Sharks have external fertilization.