Annelid Biology and Characteristics

The video introduces annelids, segmented worms like earthworms, and explores their anatomy, types, diet, and reproduction. Annelids have unique features such as segmented bodies and breathing through their skin. The video discusses three classes of annelids: polychaeta, oligocata, and herodina, highlighting their habitats and characteristics. It also covers their diet, which includes detritivores, and their reproduction methods, both sexual and asexual. Finally, the video examines whether annelids are beneficial or harmful, noting their use in fishing, soil fertilization, and medicine.

What is a unique feature of annelids that allows them to survive damage to their body segments?

• They have a hard exoskeleton.

• Each segment can function independently.

• They have a protective outer shell.

• They regenerate lost segments instantly.

How do annelids breathe?

• Through gills

• Through spiracles

• Through lungs

• Through their skin

What is the term used to describe the division of an annelid's body into segments?

• Asymmetrical division

• Bilateral symmetry

• Metameric segmentation

• Radial segmentation

Which class of annelids is known for having many bristles and being marine?

• Polychaeta

• Nematoda

• Oligochaeta

• Hirudinea

What is a common example of an annelid from the class Oligochaeta?

• Leech

• Bristle worm

• Earthworm

• Tapeworm

How do some annelids reproduce asexually?

• By binary fission

• By body fragmentation

• By laying eggs

• By budding

What is a unique feature of leeches from the class Hirudinea?

• They are bioluminescent.

• They can fly.

• They have 32 brains.

• They have a venomous bite.

What do detritivorous annelids primarily feed on?

• Insects

• Aquatic plants

• Sediments and deposits

• Large mammals

How are annelids beneficial to agriculture?

• They produce honey.

• They control pest populations.

• They pollinate flowers.

• Their waste acts as a natural fertilizer.

In what way can medicinal leeches be beneficial to humans?

• They can remove toxic blood.

• They produce antibiotics.

• They improve vision.

• They enhance muscle growth.