QUESTION | ANSWER | EXPLANATION |
In atom bomb explosion, _______ energy is primarily converted into _______ energy. atomic, sound
chemical, atomic
chemical, light
atomic, heat
| atomic, heat | |
The property of plants to manufacture their food is known as _______. Phototropism
Phototaxis
Autotrophism Photokinesis
| Autotrophism | |
_______ convert chemical energy to electrical energy. Battery cells Bulbs
Microwave ovens
Air conditioners
| Battery cells | |
Which is not a scavenger ? Camel Vulture
Hyaena
Crow
| Camel | Scavenger is an organism which feeds on dead and putrefying flesh. |
When coal is burnt, _______ energy is converted into light and heat. Chemical Electric
Atomic
| Chemical | |
What is the name given to the green pigment in plants ? Stomata
Tendrils
Starch
Chlorophyll
| Chlorophyll | |
From the bark of which tree is quinine obtained? Redwood
Eucalyptus
Bunyan
Cinchona
| Cinchona | |
What is quinine used for ? Curing Aids
Curing Typhoid
Removing pimples
Curing Malaria
| Curing Malaria | |
Which organism is helpful in making the soil fertile ? Roundworm
Beetle
Ringworm
Earthworm
| Earthworm | |
When water is boiled, it is converted into steam. This is an example of conversion of _______ energy to mechanical energy. Heat Chemical
Light
Atomic
| Heat | |
Which is not a herbivorous animal ? Cow
Monkey
Deer
Lion
| Lion | Herbivores are plant-eating animals. Lion is a carnivorous (flesh-eating) animal. |
Movement of organisms away from the sunlight is known as _______. Negative phototaxis Positive phototaxis
Photoperiodism
Autotrophism
| Negative phototaxis | Movement of organisms in response to sunlight is known as phototaxis. Earthworms exhibit negative phototaxis, while green flagellates exhibit positive phototaxis. |
Which is a by-product of photosynthesis ? Carbon dioxide
Nitrogen
Oxygen ATP
| Oxygen | In the presence of sunlight, plants utilize CO2 to prepare their food. This can be expressed as: carbon dioxide + water ------> glucose + water + oxygen |
_______ is made from bamboo plants. Silk
Paper Jute
Rubber
| Paper | |
Which is not a 'renewable' resource of energy ? Sun
Water
Petroleum Wind
| Petroleum | |
Plants manufacture their food by the process of Symbiosis
Photokinesis
Photosynthesis Chemosynthesis
| Photosynthesis | In the presence of sunlight, plants utilize CO2 to prepare their food. This can be expressed as: carbon dioxide + water ------> glucose + water + oxygen |
Light energy is converted into chemical energy by the process of Photokinesis
Photoperiodism
Symbiosis
Photosynthesis
| Photosynthesis | In 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 |
The response of plants to light is known as Chemotropism
Thigmotropism
Phototropism Hydrotropism
| Phototropism | |
Autotrophic component of the ecosystem Consumers
Decomposers
All of these
Producers
| Producers | Ecosystem 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. |
Nitrogen-fixing bacterium Lactobacillus
Rhizobium Clostridium
Salmonella
| Rhizobium | Rhizobium 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. |
Interaction between organisms of different species so as to get benefit from each other is known as Saprophytism
Symbiosis Predation
Etiolation
| Symbiosis | Rhizobium 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. |
Which is not true regarding parasites ? They live on or inside the other organism.
They are always beneficial to the other organism. They derive their food from the organism on which they live.
Leech is a parasite.
| 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. |
Which is not a 'biotic part' of the ecosystem ? Plants
Insects
Water Bacteria
| Water | Ecosystem 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. |
Which is not a 'nonrenewable' source of energy ? Coal
Petrol
Soil
Wind
| Wind | |
Which fungus is used in making bread? Aspergillus
Penicillium
Yeast Pleurotus
| Yeast | Yeast is a leavening agent used in baking. It causes fermentation of carbohydrates and produces gas which lightens the dough. |
Belladona has medicinal properties. False
True
| True | Belladona is a herb used in praparing many drugs. |
Saprophytes derive their food from dead organisms. False
True
| True | |
Silk fibre is produced by certain insects. False
True
| True | Silk fibres are produced by silkworms to form a protective covering (cocoon) around themselves. |
Water is used to produce electricity. True False
| True | Electricity 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. |
Food energy is transferred from one organism to the other through food webs. True False
| True | The interlinking of several food chains constitutes food webs. |
Mammals are homeothermic animals. False
True
| True | Homeothermic organisms like mammals and birds are capable of maintaining a constant body temperature despite changes in atmospheric temperature. |
Man is an amphibian. True
False
| False | Amphibians are organisms which are capable of living inside as well as outside the water, e.g., frog, toad, alligator, crocodile, newt and salamander. |
Very high concentration of carbon dioxide accelerates plant growth. True
False
| False | Very high concentration of carbon dioxide retards plant growth. |
'Lac' is a plant product. True
False
| False | Lac is a semisolid substance secreted by 'lac insects'. |