Echinoderm Characteristics and Defenses

The video explores echinoderms, focusing on their characteristics, anatomy, and defense mechanisms. Echinoderms, like starfish, have spiny skin and radial symmetry, living exclusively in the ocean. They are invertebrates with unique features such as tube feet, aiding in movement and feeding. The video also highlights their defense strategies, including chemical and physical deterrents. The content concludes with a review of key points, emphasizing the fascinating nature of these marine creatures.

What is the origin of the term 'echinoderm'?

• Spanish, meaning 'ocean skin'

• French, meaning 'star skin'

• Latin, meaning 'spiny skin'

• Greek, meaning 'soft skin'

Which of the following is a common feature of all echinoderms?

• They exhibit radial symmetry

• They live on land

• They are mammals

• They have a backbone

How are echinoderms different from humans in terms of body symmetry?

• Echinoderms have bilateral symmetry, humans have radial symmetry

• Both have bilateral symmetry

• Both have radial symmetry

• Echinoderms have radial symmetry, humans have bilateral symmetry

What is the function of tube feet in echinoderms?

• To communicate with other echinoderms

• To fly

• To help in movement, feeding, and respiration

• To produce light

What is the water vascular system in echinoderms?

• A system of air-filled canals

• A digestive system

• A series of blood vessels

• A network of fluid-filled canals

Which echinoderm has a unique defense mechanism involving sticky threads?

• Starfish

• Sea urchin

• Sea cucumber

• Sand dollar

What type of defenses do some echinoderms use against predators?

• Camouflage

• Chemical and physical defenses

• Speed

• Loud noises

What is a common physical defense found in most echinoderms?

• Electric shock

• Venomous bite

• Spiny skin

• Sharp teeth

What is the most famous type of echinoderm?

• Sand dollar

• Sea cucumber

• Sea urchin

• Starfish

What is a unique feature of echinoderm larvae compared to adults?

• They are radially symmetrical

• They are bilaterally symmetrical

• They have a backbone

• They live on land