Biology Practice: Classification of Animals (Mock Test 5 - Ultimate Comprehensive)
1. In "Diploblastic" animals like Hydra, which layer is found between the ectoderm and endoderm?
2. Which type of true coelom arises from the outpocketing of the embryonic gut (endoderm)?
3. "Metamerism" is the phenomenon of metameric segmentation found in:
4. The "Open" type of circulatory system, where cells are directly bathed in blood, is found in:
5. "Cytosine arabinoside", a medicine for cancer, was historically extracted from which organism?
6. Why are mammals and birds called "Warm-blooded" or Endotherms?
7. In which group does the notochord appear ONLY in the tail of the larva and disappears in the adult?
8. Which phylum includes the "roundworms" that cause diseases like elephantiasis?
9. The coelomic cavity of Molluscs is reduced and called "Haemocoel" because it is filled with:
10. "Enterocoelomates" include which of the following groups?
11. Sharks are classified as "Cartilaginous fishes" because:
12. Which vertebrate class possesses a "four-chambered" heart?
13. In which animal phylum is a "Water-driven tube system" used for movement?
14. Toads and Salamanders are called "Amphibians" because they:
15. The largest phylum of the animal kingdom, containing over 900,000 species, is:
16. Which phylum contains the first "Triploblastic" animals, but lacks a true coelom?
17. In the Sub-phylum Vertebrata, the notochord is replaced in the adult by the:
18. "Jointed legs" is the literal meaning of the name of which phylum?
19. Why do birds have "hollow bones" with air cavities?
20. The presence of mammary glands and a diaphragm is a characteristic feature of: