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Given the QUESTION, identify the ANSWER
1. In atom bomb explosion, _______ energy is primarily converted into _______ energy.
• atomic, sound
• chemical, atomic
• chemical, light
• atomic, heat
Answer: atomic, heat
2. The property of plants to manufacture their food is known as _______.
• Autotrophism
• Phototropism
• Phototaxis
• Photokinesis
Answer: Autotrophism
3. _______ convert chemical energy to electrical energy.
• Bulbs
• Battery cells
• Microwave ovens
• Air conditioners
Answer: Battery cells
4. Which is not a scavenger ?
• Camel
• Vulture
• Hyaena
• Crow
Answer: CamelScavenger is an organism which feeds on dead and putrefying flesh.
5. When coal is burnt, _______ energy is converted into light and heat.
• Chemical
• Electric
• Atomic
Answer: Chemical
6. What is the name given to the green pigment in plants ?
• Stomata
• Chlorophyll
• Tendrils
• Starch
Answer: Chlorophyll
7. From the bark of which tree is quinine obtained?
• Redwood
• Eucalyptus
• Bunyan
• Cinchona
Answer: Cinchona
8. What is quinine used for ?
• Curing Aids
• Curing Typhoid
• Removing pimples
• Curing Malaria
Answer: Curing Malaria
9. Which organism is helpful in making the soil fertile ?
• Roundworm
• Earthworm
• Beetle
• Ringworm
Answer: Earthworm
10. When water is boiled, it is converted into steam. This is an example of conversion of _______ energy to mechanical energy.
• Heat
• Chemical
• Light
• Atomic
Answer: Heat
11. Which is not a herbivorous animal ?
• Lion
• Cow
• Monkey
• Deer
Answer: LionHerbivores are plant-eating animals. Lion is a carnivorous (flesh-eating) animal.
12. Movement of organisms away from the sunlight is known as _______.
• Positive phototaxis
• Photoperiodism
• Autotrophism
• Negative phototaxis
Answer: Negative phototaxisMovement of organisms in response to sunlight is known as phototaxis. Earthworms exhibit negative phototaxis, while green flagellates exhibit positive phototaxis.
13. Which is a by-product of photosynthesis ?
• Carbon dioxide
• Oxygen
• Nitrogen
• ATP
Answer: OxygenIn the presence of sunlight, plants utilize CO2 to prepare their food. This can be expressed as: carbon dioxide + water ------> glucose + water + oxygen
14. _______ is made from bamboo plants.
• Silk
• Jute
• Paper
• Rubber
Answer: Paper
15. Which is not a 'renewable' resource of energy ?
• Petroleum
• Sun
• Water
• Wind
Answer: Petroleum
16. Plants manufacture their food by the process of
• Photosynthesis
• Symbiosis
• Photokinesis
• Chemosynthesis
Answer: PhotosynthesisIn the presence of sunlight, plants utilize CO2 to prepare their food. This can be expressed as: carbon dioxide + water ------> glucose + water + oxygen
17. Light energy is converted into chemical energy by the process of
• Photokinesis
• Photoperiodism
• Symbiosis
• Photosynthesis
Answer: PhotosynthesisIn the presence of sunlight (light energy), plants utilize CO2 to prepare their food (chemical energy). This can be expressed as: carbon dioxide + water ------> glucose + water + oxygen
18. The response of plants to light is known as
• Phototropism
• Chemotropism
• Thigmotropism
• Hydrotropism
Answer: Phototropism
19. Autotrophic component of the ecosystem
• Consumers
• Producers
• Decomposers
• All of these
Answer: ProducersEcosystem has two components : biotic or living and abiotic or non-living. Biotic components include producers (autotrophic components i.e., plants), consumers and decomposers. Abiotic components include organic and inorganic substances and environmental factors.
20. Nitrogen-fixing bacterium
• Rhizobium
• Lactobacillus
• Clostridium
• Salmonella
Answer: RhizobiumRhizobium is found in root nodules of pea. It gets its nourishment from these plants. In turn, it provides nitrates to the plants which are used in protein synthesis. This is a good example of symbiosis.
21. Interaction between organisms of different species so as to get benefit from each other is known as
• Symbiosis
• Saprophytism
• Predation
• Etiolation
Answer: SymbiosisRhizobium is found in root nodules of pea. It gets its nourishment from these plants. In turn, it provides nitrates to the plants which are used in protein synthesis. This is a good example of symbiosis.
22. Which is not true regarding parasites ?
• They live on or inside the other organism.
• They derive their food from the organism on which they live.
• They are always beneficial to the other organism.
• Leech is a parasite.
Answer: They are always beneficial to the other organism.Parasites derive their nutrition from the organism on which they live and thus deprive the organism of those nutrients.
23. Which is not a 'biotic part' of the ecosystem ?
• Water
• Plants
• Insects
• Bacteria
Answer: WaterEcosystem has two components : biotic or living and abiotic or non-living. Biotic components include producers, consumers and decomposers. Abiotic components include organic and inorganic substances and environmental factors.
24. Which is not a 'nonrenewable' source of energy ?
• Coal
• Wind
• Petrol
• Soil
Answer: Wind
25. Which fungus is used in making bread?
• Aspergillus
• Penicillium
• Yeast
• Pleurotus
Answer: YeastYeast is a leavening agent used in baking. It causes fermentation of carbohydrates and produces gas which lightens the dough.
26. Belladona has medicinal properties.
• False
• True
Answer: TrueBelladona is a herb used in praparing many drugs.
27. Saprophytes derive their food from dead organisms.
• True
• False
Answer: True
28. Silk fibre is produced by certain insects.
• True
• False
Answer: TrueSilk fibres are produced by silkworms to form a protective covering (cocoon) around themselves.
29. Water is used to produce electricity.
• False
• True
Answer: TrueElectricity produced with the help of water is known as hydroelectricity. Water falling from a height causes rotation of turbines which in turn causes movement of generators to produce electricity.
30. Food energy is transferred from one organism to the other through food webs.
• True
• False
Answer: TrueThe interlinking of several food chains constitutes food webs.
31. Mammals are homeothermic animals.
• False
• True
Answer: TrueHomeothermic organisms like mammals and birds are capable of maintaining a constant body temperature despite changes in atmospheric temperature.
32. Man is an amphibian.
• True
• False
Answer: FalseAmphibians are organisms which are capable of living inside as well as outside the water, e.g., frog, toad, alligator, crocodile, newt and salamander.
33. Very high concentration of carbon dioxide accelerates plant growth.
• True
• False
Answer: FalseVery high concentration of carbon dioxide retards plant growth.
34. 'Lac' is a plant product.
• True
• False
Answer: FalseLac is a semisolid substance secreted by 'lac insects'.
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