Mollusks: Features and Functions

The video tutorial covers the classification, characteristics, and adaptations of mollusks, including their soft bodies, hard shells, and gills for gas exchange. It explains bilateral symmetry and provides examples like snails, clams, and octopi. The tutorial also highlights distinguishing features such as the muscular foot and mantle, which aid in movement and protection.

What is the primary focus of today's lesson on mollusks?

• The diet of mollusks

• The history of mollusks

• The classification and survival of mollusks

• The habitat of mollusks

Which of the following best describes mollusks?

• Invertebrates with exoskeletons

• Vertebrates with soft bodies

• Invertebrates with soft bodies

• Vertebrates with hard shells

What is the primary function of gills in mollusks?

• To facilitate gas exchange

• To protect the soft body

• To store food

• To aid in locomotion

How is bilateral symmetry exhibited in mollusks?

• They have radial symmetry

• They have no symmetry

• Their right and left sides are mirror images

• Their bodies are asymmetrical

Which of the following is NOT an example of a mollusk?

• Crab

• Slug

• Snail

• Octopus

What is the function of the muscular foot in mollusks?

• To protect the body

• To aid in respiration

• To capture prey

• To assist in movement

What is the role of the mantle in mollusks?

• To capture food

• To assist in locomotion

• To aid in digestion

• To secrete the shell

Which part of the mollusk is responsible for secreting the shell?

• The radula

• The gills

• The foot

• The mantle

What is a common feature among different types of mollusks?

• They all live in water

• They all have tentacles

• They all have external shells

• They all have a muscular foot

Which of the following is a distinguishing feature of mollusks?

• Feathers

• Fur

• Muscular foot

• Exoskeleton