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.
Play all 46 questions freeSample questions
Which phylum is characterized by the presence of a notochord at some stage of its life cycle?
- Arthropoda
- Mollusca
- Chordata
- 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).
Which of the following is NOT a characteristic of the Kingdom Animalia?
- Eukaryotic cells
- Multicellular organization
- Autotrophic nutrition
- 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.
In a forest ecosystem, a large herbivore consuming grass and leaves would occupy which trophic level?
- Producer
- Primary Consumer
- Secondary Consumer
- 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.
The smallest unit of ecological organization that includes both biotic and abiotic factors is:
- Population
- Community
- Ecosystem
- 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.
Which phylum contains organisms with a radially symmetrical body, an incomplete or complete digestive system, and often a water vascular system?
- Annelida
- Arthropoda
- Chordata
- 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.