Diversity in Living Organisms – Five Kingdoms & Ecosystems Quiz - ICSE Class 9 Biology

Free practice quiz: Diversity in Living Organisms – Five Kingdoms & Ecosystems (ICSE Class 9 Biology). 46 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This ICSE Class 9 Biology practice quiz has 46 multiple-choice questions on Diversity in Living Organisms – Five Kingdoms & Ecosystems, and 46 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. Which phylum is characterized by the presence of a notochord at some stage of its life cycle?

   1. Arthropoda
   2. Mollusca
   3. Chordata
   4. Annelida
   Show answer

   Answer: C. Chordata

   The defining characteristic of the phylum Chordata is the presence of a notochord, a flexible rod-like structure, at some point during their development. This structure is absent in Arthropods (exoskeleton), Molluscs (soft body, often with a shell), and Annelids (segmented worms).

2. Which of the following is NOT a characteristic of the Kingdom Animalia?

   1. Eukaryotic cells
   2. Multicellular organization
   3. Autotrophic nutrition
   4. Ability to move (at some stage of life)
   Show answer

   Answer: C. Autotrophic nutrition

   Animals are heterotrophic, meaning they obtain nutrients by consuming other organisms. While they are eukaryotic, multicellular, and generally capable of movement, autotrophic nutrition (like plants) is not a characteristic of this kingdom.

3. In a forest ecosystem, a large herbivore consuming grass and leaves would occupy which trophic level?

   1. Producer
   2. Primary Consumer
   3. Secondary Consumer
   4. Tertiary Consumer
   Show answer

   Answer: B. Primary Consumer

   Producers (plants like grass and leaves) create their own food. Primary consumers are herbivores that feed on producers. Secondary consumers eat primary consumers, and tertiary consumers eat secondary consumers.

4. The smallest unit of ecological organization that includes both biotic and abiotic factors is:

   1. Population
   2. Community
   3. Ecosystem
   4. Biosphere
   Show answer

   Answer: C. Ecosystem

   An ecosystem is a fundamental unit in ecology that comprises all the living organisms (biotic factors) in a particular area, interacting with each other and with their physical environment (abiotic factors). A population is a group of the same species, a community is all populations in an area, and the biosphere is the sum of all ecosystems.

5. Which phylum contains organisms with a radially symmetrical body, an incomplete or complete digestive system, and often a water vascular system?

   1. Annelida
   2. Arthropoda
   3. Chordata
   4. Echinodermata
   Show answer

   Answer: D. Echinodermata

   Echinoderms (starfish, sea urchins, sea cucumbers) are exclusively marine animals characterized by pentaradial symmetry (a type of radial symmetry) in their adult stage, a calcified endoskeleton, and a unique water vascular system for locomotion and feeding.

More questions in this quiz

Answers and explanations are in the full quiz.

1. The 'red tide' phenomenon, often associated with harmful algal blooms, is primarily caused by the rapid proliferation of which group of organisms?
2. Which of the following is a key characteristic that distinguishes members of Kingdom Fungi from plants?
3. In a temperate grassland ecosystem, which trophic level would be most significantly impacted by a severe drought affecting grass growth?
4. Which of the following is a characteristic feature of Kingdom Monera?
5. A symbiotic relationship where one organism benefits and the other is harmed is termed:
6. The primary function of decomposers in an ecosystem is to:
7. Which phylum is characterized by a radially symmetrical body and the presence of stinging cells (cnidocytes)?
8. In an ecosystem, the total amount of energy available at each trophic level is typically:
9. The concept of 'biomes' in ecology refers to:
10. A population of deer is preyed upon by wolves. If the wolf population drastically decreases, what is the most likely immediate effect on the deer population?
11. Which of the following is an example of a parasitic fungus?
12. The scientific name for humans is Homo sapiens. 'Homo' refers to the:
13. An organism that can produce its own food using light energy is called a(n):
14. Which kingdom contains organisms that are typically unicellular, eukaryotic, and can be either photosynthetic or heterotrophic?
15. The process by which carbon dioxide is converted into organic compounds in plants is called:
16. What is the primary characteristic that separates birds from mammals?
17. Which of the following is a sessile (attached) organism found in Kingdom Animalia?
18. The process of nitrogen fixation, converting atmospheric nitrogen into usable forms, is primarily carried out by:
19. The term 'biodiversity' refers to:
20. Which of the following is an example of an invertebrate belonging to the phylum Mollusca?
21. In a food chain, secondary consumers are organisms that:
22. Which group of organisms is characterized by having an exoskeleton, a segmented body, and jointed appendages?
23. A climax community in ecological succession is:
24. Which of the following plant groups is characterized by having vascular tissues (xylem and phloem) but reproduces via spores rather than seeds?
25. Which animal phylum is characterized by a soft body, often protected by a shell, and includes snails, clams, and octopuses?
26. The relationship between a bee and a flowering plant, where the bee gets nectar and pollen, and the plant gets pollinated, is an example of:
27. Which of the following terms describes a group of organisms of the same species living in the same area at the same time?
28. The process by which water vapor is released from plants into the atmosphere is called:
29. Which of the following organisms belongs to Kingdom Fungi?
30. Which characteristic is unique to flowering plants (Angiosperms)?
31. A lion hunting and killing a zebra is an example of which ecological interaction?
32. The study of the interactions between organisms and their environment is known as:
33. When two species in an ecosystem rely on the same limited resource, they are engaged in:
34. Which of these is a key characteristic of Kingdom Plantae?
35. The process of a tadpole transforming into a frog is an example of:
36. Which of the following represents the highest level of biological organization in the study of ecosystems?
37. Which plant group is characterized by producing naked seeds, typically on cones?
38. The 'biological pyramid of numbers' illustrates:
39. Which organism is a unicellular prokaryote that often lives in extreme environments?
40. The ultimate source of energy for most ecosystems on Earth is:
41. What is the key distinguishing feature of the phylum Porifera?

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