Phylum Porifera

The video provides an overview of Phylum Porifera, commonly known as sponges. It covers their aquatic nature, body structure, and cellular organization. Sponges have a unique water transport system and lack true tissues and organs. They reproduce both sexually and asexually, with internal fertilization and indirect development through a larval stage. Sponges are filter feeders, relying on water flow for feeding and respiration.

What is the primary habitat of members of Phylum Porifera?

• Desert

• Polar regions

• Aquatic, mostly marine

• Terrestrial

What is the function of the osculum in sponges?

• To capture prey

• To protect from predators

• To release water

• To absorb nutrients

How do sponges primarily feed?

• By absorbing nutrients from the soil

• By photosynthesis

• By hunting small fish

• By filter feeding

What is the excretory product of sponges?

• Ammonia

• Urea

• Nitrogen

• Carbon dioxide

How do sponges reproduce asexually?

• By spore formation

• By fragmentation

• By binary fission

• By budding