Skachat Besplatno Prezentatsii Po Biologii 7 Klass Briukhonogie Molliuski 〈Cross-Platform〉

Biology, 7th Grade Topic: Diversity, Structure, and Role in Nature 📂 Slide 1: Introduction Definition: Gastropods are the largest class of mollusks. Species: Over 100,000 known species. Habitat: Occupy sea, freshwater, and land. Key Feature: A single, often spiral-shaped shell. 📂 Slide 2: External Structure

Use high-quality photos of a Grape Snail (Vinogradnaya ulitka) and a Slug (Slizen). Biology, 7th Grade Topic: Diversity, Structure, and Role

Lives in freshwater, breathes atmospheric air. 7th Grade Topic: Diversity

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. 000 known species. Habitat: Occupy sea

Snails carry parasitic worms (e.g., Liver Fluke). 💡 Tips for your presentation:

Evolutionarily lost their shells to move into tight spaces.