Skachat Besplatno Prezentatsii Po Biologii 7 Klass Briukhonogie Molliuski [ 1080p 2027 ]

Provides protection; can be coiled (right or left-handed) or reduced (as in slugs). 📂 Slide 3: Internal Anatomy

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. Provides protection; can be coiled (right or left-handed)

Ask the class why a snail leaves a "slime trail" (Answer: To reduce friction and protect the foot). If you'd like, I can help you: Write a quiz for the final slide. Provide a script for what to say while presenting. Find specific Latin names for the species mentioned. Development: Direct (small snails hatch from eggs)

Includes a radula (a "grater" with chitinous teeth) to scrape food. Respiration: Aquatic species: Gills . Terrestrial species: A lung (a modified mantle cavity). Ask the class why a snail leaves a

Evolutionarily lost their shells to move into tight spaces.

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

Lives in freshwater, breathes atmospheric air.