Orca Anatomy and Ecology

The video explores the evolutionary journey of orcas from land-dwelling ancestors to aquatic mammals. It highlights the anatomical adaptations that have enabled orcas to thrive in the ocean, such as the migration of nostrils to form a blowhole and the transformation of limbs. The video also discusses the orca's role as a top predator, emphasizing its sharp teeth and hunting capabilities.

What is the closest modern relative to orcas?

• Hippopotamus

• Sea Lions

• Dolphins

• Sharks

Which anatomical feature of orcas evolved to help them breathe efficiently in water?

• Tail

• Blowholes

• Gills

• Fins

Where are the nostrils located in modern orcas?

• Under the chin

• On top of the skull

• On the front of the skull

• On the sides of the head

What is a significant adaptation that allows orcas to be streamlined in water?

• Their flippers

• Their blowholes

• Their conical teeth

• Their large size

What happened to the hind legs of orcas during their evolution?

• They became larger

• They turned into flippers

• They became fins

• They disappeared

What remains of the orca's hind legs?

• Large bones

• Pelvic bones

• Fins

• Nothing

What type of teeth do orcas have?

• Sharp conical teeth

• Flat molars

• No teeth

• Incisors

How do orcas consume their prey?

• By chewing

• By swallowing whole

• By grasping and tearing

• By filtering

What is the role of orcas in the ocean ecosystem?

• Top predators

• Herbivores

• Scavengers

• Filter feeders

Which of the following is NOT a prey for orcas?

• Blue whales

• Small schooling fish

• Seaweed

• Seals