Question

II. Fill in the blanks.
1. The skeletal framework of Porifera is
2. Ctenidia are respiratory organs in
3. Skates are
fishes.
4. The larvae of an
amphibian is
5.
6.
are jawless vertebrates.
is the unique characteristic
feature of mammal.​

Answer 1

Answer:

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Answer 2

Answer:

1)Spicules

2)Molluscs

3)Cartilagenous

4)Tadpoles

5)Class Aganata (lampreys and Hagfishes)

6)Mammary glands.