GS Biology Questions and Answers
GS Biology questions with answers enhance your general science knowledge, especially for exams like SSC, Railways, and UPSC. Biology is an important branch of general science that deals with the study of life, organisms, and their vital processes. These general science questions and answers cover topics such as cells, human anatomy, genetics, and ecology — frequently asked in competitive exams. Practicing these questions helps you understand biological concepts clearly and boosts your score in the general awareness section. Strengthen your science fundamentals and prepare effectively for multiple-choice questions in upcoming tests.
GS Biology
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357 questions
321. Among the following, which plant is completely devoid of roots?
- Ceratophyllum
- Hydrilla
- Vallisneria
- Azolla
322. What is the name given for an association of two species where one is benefited and the other remains unaffected or unharmed?
- Parasitism
- Symbiosis
- Commensalism
- Predation
323. Occurrence of Zoochlorellae in the body wall of Hydra is an example of
- predation
- food chain involving a parasite
- commensalism
- mutualism
324. Which one of the following is a protective device?
- Competition
- Camouflage
- Commensalism
- Symbiosis
325. What is the sequence of species through which organic molecules in a community pass called?
- Pyramid of energy
- Nutrient cycle
- Food web
- Food chain
326. A food chain consists of
- producers and primary consumers
- producers, herbivores and carnivores
- producers, consumers and decomposers
- producers, carnivores and decomposers
327. Which of the following is the correct sequence in food chain?
- Fallen leaves → bacteria → insect larvae → birds
- Phytoplankton → zooplankton → fish
- Grasses → fox → rabbit
- Grasses → chameleon → insects → birds
328. Generally, the food chain has how many trophic levels?
- One
- Two
- Three
- Three or four
329. Correct path of energy flow in a system is
- Producers → Herbivores → Carnivores → Decomposers
- Producers → Carnivores → Herbivores → Decomposers
- Herbivores → Producers → Carnivores → Decomposers
- Herbivores → Carnivores → Producers → Decomposers
330. When man eats fish, which feeds on zooplanktons, which have eaten small plants, the producer in the chain is
- zooplankton
- small plants
- man
- fish