Biology Practice: Classification of Animals (Mock Test 3 - Advanced)
1. In advanced classification, "Enterocoelom" is a body cavity that arises from:
2. Which phyla display a "Schizocoelom" arising from a mesodermal split?
3. What was the name of the sea sponge from which the anti-cancer drug 'cytosine arabinoside' was isolated in 1959?
4. Why are Platyhelminthes (Flatworms) unable to have fully developed organs?
5. "Liver rot" is a serious disease in sheep and goats caused by which organism?
6. In Phylum Mollusca, the coelomic cavity is reduced and filled with hemolymph. This reduced cavity is called:
7. Earthworms do not have eyes. How do they differentiate between light and darkness?
8. Which phylum is the FIRST to show a "triploblastic" organization (three germ layers)?
9. "Metameric segmentation" is a phenomenon where the body is internally and externally divided into segments. Which animal is the classic example?
10. In diploblastic animals, what is the name of the undifferentiated mass that fills the space between ectoderm and endoderm?
11. Which phylum contains more than 900,000 species and is the largest in the Animal Kingdom?
12. The Notochord is a rod-like structure that originates from which germ layer?
13. In molluscs, the soft body is typically divided into three regions. These are:
14. Which Echinoderm is commonly known as the 'serpent star'?
15. The "Great Barrier Reef" is the world's largest coral reef. It extends to approximately:
16. Which phylum contains "roundworms" and is the first to show a false body cavity (pseudocoelom)?
17. In chordates, the "dorsal nerve cord" and "notochord" are both present. The notochord acts as:
18. The cells of a sponge can contain approximately how many other animals inside themselves?
19. Which phylum contains "spiny-skinned" animals that have radial symmetry as adults but bilateral symmetry as larvae?
20. Which of the following is an example of an organism with a "closed" type circulatory system?