Terminology and Summary of Criteria for Classification

Q.

Why do we classify organisms?

Q.

What is an asymmetrical animal? Give an example.

Q. Bilateral symmetry, metameric segmentation, coelom and open circulatory system characterize which of the following organisms?

1. Leech
2. Mussel
3. Crab
4. Sponges

Q.

Is a jellyfish radial or bilateral?

Q. Blastopore develops into the anus in

1. protostomes
2. deuterostomes
3. pseudocoelomates
4. acoelomates

Q.

What is bilateral symmetry?

Q. Animals with blood flowing in blood vessels are said to have a closed circulatory system.

1. False
2. True

Q. ___acts as a connecting link between Annelida and Mollusca.

1. Sepia
2. Nautilus
3. Neopilina
4. Loligo

Q. Find out the odd one.

1. Adamsia
2. Astraea
3. Physalia
4. Pleurobrachia

Q. Digestion begins in the mouth. Which of the following statement is incorrect?

1. The tongue aids in the digestion of the food.
2. The saliva changes some of the starches in the food to sugar.
3. The tongue keeps the food in place in the mouth while the food is being chewed.
4. The digestive juices can react more easily with food when chewed.

Q.

Choose the correct option.

1. Aves and Chordata — Classes

2. Annelida and Porifera — Phyla

3. Mollusca and Hydrozoa — Classes

4. Oligochaeta and Arthropoda — Phyla

Q.

What is a characteristic?

Q. Mantle, foot and shell are the characters of which of the following phylum?

1. Nautilus
2. Echinus
3. Limulus
4. Euplectella

Q. One very special feature in the earthworm (Pheretima) is that

1. Fertilization of eggs occurs inside the body
2. It has a long dorsal tubular heart.
3. The typhlosole greatly increases the effective absorption area of the digested food in the intestine
4. The S-shaped setae embedded in the integument are the defensive weapons used against the enemies

Q. Assertion :Metameric animals are triploblastic. Reason: Triploblastic animals are bilaterally symmetrical

1. Both are correct
2. Both are incorrect
3. 1 is correct, 2 is incorrect
4. 1 is incorrect, 2 is correct

Q. Blastopore develops into the anus in

1. protostomes
2. deuterostomes
3. pseudocoelomates
4. acoelomates

Q. Bilateral symmetry, metameric segmentation, coelom and open circulatory system characterize which of the following organisms?

1. Leech
2. Mussel
3. Crab
4. Sponges