Write down the scientific name of Feather star and Apple snail

CBSE Class 9 CBSE Class 9 Science
1
  1. write down the scientific name of the following
    • Feather star
    • Apple snail
  2. Identify the animal groups having following characteristics
    • Bones are light and hollow.
    • External ear or pinna.
  3. Coelenterata is also called Cnidaria. Give reason.
2
  1. The scientific names of the following are
    • Antedon (Feather star)
    • Pila (Apple snail)
    • Aves
    • Mammalia
  3. Coelenterata is called Cnidaria because of the presence of stinging cells called cnidoblasts.