Phylum Mollusca

Q. Identify the Phylum to which the organisms shown in the given figures belong.

1. Chordata
2. Mollusca
3. Echinodermata
4. Platyhelminthes

Q. A triploblastic invertebrate with a hard calcareous shell belongs to phylum X . Mostly they are bilaterally symmetrical, though there are a few exceptions. Identify X.

1. Annelida
2. Arthropoda
3. Echinodermata
4. Mollusca

Q. Which among the following is not the characteristic of Phylum Mollusca?

1. Only marine
2. Soft bodied organisms
3. Unsegmented
4. Presence of shell

Q. Haemoglobin is a respiratory pigment found in the ____ .

1. red blood cells
2. white blood cells
3. platelets
4. plasma

Q.

You are given leech, Nereis, Scolopendra, prawn, and scorpion; and all have segmented body organization. Will you classify them into one group? If no, give the important characters based on which you will separate these organisms into different groups.

Q. Assertion : Aquatic mammals like whales and seals are said to be ureotelic animals.​
Reason : The main nitrogenous waste product in whales and seals is urea.

1. Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
2. Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
3. Assertion is true but Reason is false.
4. Both Assertion and Reason are false.

Q. Assertion : Aquatic mammals like whales and seals are said to be ureotelic animals.​
Reason : The main nitrogenous waste product in whales and seals is urea.

Q. Which is the correct matching set from the following?

1. Calcarea, Oligochaeta and Aves are classes
2. Arthropoda, Mollusca, Chordata are phyla
3. Both A and B
4. None of the above