1st Year Biology Chapter 10 Test10. Animalia

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. Triploblastic animals have ______ germ layers.
   1. One
   2. Two
   3. Three
   4. Four
2. The water vascular system is characteristic of __________.
   1. Arthropods
   2. Echinoderms
   3. Annelids
   4. Molluscs
3. The main identifying feature of chordates is the presence of __________.
   1. Brain
   2. Notochord
   3. Gills
   4. Segmentation
4. True coelom is completely lined by ______.
   1. Endoderm
   2. Ectoderm
   3. Mesoderm
   4. Epidermis
5. What is a radula?
   1. A spiny ribbon of tissues used for feeding in snails.
   2. A gas exchange structure in insects
   3. A stinging cell used by sea anemones to capture prey
   4. A supportive rod on the dorsal surface of chordates
6. The exoskeleton of arthropods is made up of __________.
   1. Calcium
   2. Cellulose
   3. Keratin
   4. Chitin
7. A land snail, a clam, and an octopus all share:
   1. Gills
   2. Embryonic torsion
   3. Mantle
   4. Radula
8. Body temperature of birds remains __________.
   1. Constant
   2. Variable
   3. Low
   4. High
9. Reptiles lay eggs with __________.
   1. Hard calcareous shell
   2. Soft gelatinous shell
   3. Without shell
   4. None of these
10. The largest phylum in Animalia is __________.
    1. Chordata
    2. Arthropoda
    3. Mollusca
    4. Annelida