Skachat Besplatno Prezentatsii Po Biologii 7 Klass Briukhonogie Molliuski -

Lives in freshwater, breathes atmospheric air.

Consists of a head , a visceral hump (inside the shell), and a muscular foot .

Most terrestrial snails (e.g., Grape Snails). Lives in freshwater, breathes atmospheric air

Include a labeled drawing of the Radula and the Internal Organs .

Evolutionarily lost their shells to move into tight spaces. Include a labeled drawing of the Radula and

Part of the food chain; decomposers of organic matter. For Humans: Food source: Escargot (snails). Pests: Slugs damage agricultural crops. Medicine: Source of mucus for cosmetics and research.

Snails carry parasitic worms (e.g., Liver Fluke). 💡 Tips for your presentation: For Humans: Food source: Escargot (snails)

Many marine species (separate males and females). Fertilization: Usually internal. Development: Direct (small snails hatch from eggs). Indirect (larval stage in some marine species). 📂 Slide 5: Diversity of Gastropods Grape Snail: A common land herbivore.