Exoskeleton

Q. State whether true or false:
The exoskeleton of arthropods is made up of lignin.

1. True
2. False

Q. Which of the following organisms have exoskeleton?

1. Nereis
2. Pheretima
3. Leech
4. Housefly

Q. Pick the wrong statement(s) from the following:

1. Annelids have a closed circulatory system.
2. Crabs possess an endoskeleton.
3. Animals belonging to Phylum Porifera are exclusively aquatic.
4. Nematocysts are characteristic of Phylum Cnidaria.

Q. Chitinous exoskeleton and metameric segmentation are features of the phylum

1. Annelida and Arthropoda, respectively
2. Arthropoda and Aschelminthes, respectively
3. Annelida and Aschelminthes, respectively
4. Arthropoda and Annelida, respectively

Q. Pick the wrong statement(s) from the following:

1. Annelids have a closed circulatory system.
2. Crabs possess an endoskeleton.
3. Animals belonging to Phylum Porifera are exclusively aquatic.
4. Nematocysts are characteristic of Phylum Cnidaria.