Question

1. Animals which do not have a True body cavity. a) Acoelomates b) Coelomates c) Pseudocoelomates d) Radial Symmetry 2. Fishes are _________ blooded animals. 3. Balanoglossus is _________ worm. 4. Match: a) Cytostomes i) Leech b) Cartilaginous fishes ii) Hagfish c) Bony fish iii) Skates d) Annelida iv) Mullets 5. What is nematocyst?​

Answer 1

Answer:

1. Animals which do not have a True body cavity.

a) Acoelomates

b) Coelomates

c) Pseudocoelomates

d) Radial Symmetry

2) Fishes are cold blooded animals.

3). Balanoglossus is corn worm.

5)

• Nematocytes are specialized cells found in the tentacles of Cnidarians (e.g. jellyfish, hydras, sea anemones, etc.).
• Each cell contains a large capsule organelle called nematocyst. Inside the nematocyst is a thread-like, coiled, hollow tube with toxic barbs.
• This tube is everted from the capsule to deliver a paralyzing sting to the target prey or enemies.
• Thus, nematocysts are chiefly for food gathering and defense mechanism of Cnidarians.

Answer 2

Answer:

1. Acoelomates: Animals that do not have a True body cavity

2. Fishes are cold-blooded blooded animals.

3. Balanoglossus is an acorn worm.

4. (a) Cytostomes- (ii) Hagfish

    (b) Cartilaginous- (iii) Skates

    (c) Bony fish-  (iv) Mullets

    (d) Annelida-  (i) Leech

Hagfish:

• Hagfish are a type of marine cyclostome related to lampreys. They resemble eels in appearance but have a circular mouth encircled by barbels.

Skates:

• Skates are cartilaginous fish belonging to the family Rajidae in the superorder Batoidea of rays.

Mullets:

• The hair is short on the sides and top and long in the back with this haircut.

Leech:

• Leeches can be irritating, and their bites might itch, although they are rarely hazardous to people.

5. Nematocysts are found in the phylum Cnidaria, which includes jellyfishes and sea anemones.