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This section includes 639 Mcqs, each offering curated multiple-choice questions to sharpen your Science knowledge and support exam preparation. Choose a topic below to get started.
451. |
Due to complexities of biosphere, it is divided into smaller units called |
A. | Biomes |
B. | Biological System |
C. | Biosphere |
D. | Hydrosphere |
Answer» B. Biological System | |
452. |
Why large sharks remain in the highest trophic level in the aquatic food web? |
A. | Because large sharks are predators |
B. | Because large sharks are top predators |
C. | Because large sharks are phytoplankton |
D. | Because large sharks are zooplankton |
Answer» C. Because large sharks are phytoplankton | |
453. |
How many layers are found in atmosphere ? |
A. | 2 |
B. | 3 |
C. | 5 |
D. | 4 |
Answer» E. | |
454. |
Lakes, swamps, woods and sands are an examples of |
A. | Hydrosphere |
B. | Small Scale Ecosystem |
C. | Large Scale Ecosystem |
D. | Biomes |
Answer» C. Large Scale Ecosystem | |
455. |
What does climatic factor of abiotic constitute ? |
A. | Inorganic and organic substances |
B. | Biological System |
C. | Chemical Factors |
D. | Temperature and Heat |
Answer» B. Biological System | |
456. |
What are examples of primary succession? |
A. | Estuaries, Forests |
B. | Island, Sand or silt bed |
C. | Mangroves, Deserts |
D. | Forests, Wetland |
Answer» C. Mangroves, Deserts | |
457. |
How long folsom's flasks, algae and bacteria sustained life ? |
A. | 30 years |
B. | 40 years |
C. | 50 years |
D. | 80 years |
Answer» C. 50 years | |
458. |
What does a saprotrophs in ponds include ? |
A. | Frogs |
B. | Aquatic bacteria and flagellates |
C. | Fishes |
D. | All of above |
Answer» C. Fishes | |
459. |
Grasses, non flowering plants, shrubs and trees are examples of |
A. | Climax Community |
B. | Perennial Plants |
C. | Secondary Succession |
D. | Primary Succession |
Answer» C. Secondary Succession | |
460. |
Ecosystems are maintained by energy flows and the cycling of nutrients between |
A. | Living things |
B. | Non-Living things |
C. | Living and Non-living things |
D. | Microorganism |
Answer» D. Microorganism | |
461. |
Which ecological succession are responsible for stabilization of community? |
A. | Biodiversity |
B. | Initial causes |
C. | Ecesis causes |
D. | Stabilizing causes |
Answer» E. | |
462. |
The plants and animals living in a specific space is known as |
A. | Community |
B. | Population |
C. | Habitat |
D. | Biosphere |
Answer» D. Biosphere | |
463. |
What are the examples of crustaceans? |
A. | Water fleas and shrimps |
B. | Mulluscs |
C. | Zooplanktons |
D. | Phytoplankton's |
Answer» B. Mulluscs | |
464. |
What is ultimate source of energy in an ecosystem? |
A. | Sunlight |
B. | Nutrients |
C. | Food |
D. | Water |
Answer» B. Nutrients | |
465. |
Which of the following is the important pool of carbon? |
A. | Air |
B. | Water |
C. | Forest |
D. | Land |
Answer» D. Land | |
466. |
Green plants which manufacture their own food is known as |
A. | Heterotrophs |
B. | Autotrophs |
C. | Omnivores |
D. | Carnivores |
Answer» C. Omnivores | |
467. |
Which of the following type of forest important for watersheds? |
A. | Tropical Evergreen forest |
B. | Tropical Deciduous forest |
C. | Tropical Montane forests |
D. | Grassland forest |
Answer» D. Grassland forest | |
468. |
What's is the Abiotic elements of ecosystem |
A. | Living and Non-living things |
B. | Living things |
C. | Non-Living things |
D. | Small organisms |
Answer» D. Small organisms | |
469. |
Which food chain has a mixed group in terms of trophic levels? |
A. | Grazing food chain |
B. | Detritus food chain |
C. | Biological system |
D. | Tropical Level |
Answer» C. Biological system | |
470. |
Name the worlds wettest place? |
A. | Cherrapunji - India |
B. | Sindh-Pakistan |
C. | Middle East |
D. | Africa |
Answer» B. Sindh-Pakistan | |
471. |
There is always a loss of some energy as heat during energy flows through an ecosystem. |
A. | True |
B. | False |
C. | May be True or False |
D. | Can't say |
Answer» B. False | |
472. |
Deer, goat, grass hopper and cattles are examples of |
A. | Secondary Consumers |
B. | Primary consumers |
C. | Carnivores |
D. | Heterotrophs |
Answer» C. Carnivores | |
473. |
Water enters atmosphere by |
A. | Filtration |
B. | Evaporation |
C. | Evapo-transpiration |
D. | Biosphere |
Answer» C. Evapo-transpiration | |
474. |
What are examples of unsubsidized natural solar powered ecosystem? |
A. | Machines |
B. | Forests, Oceans and Grasslands |
C. | Houses |
D. | Industries |
Answer» C. Houses | |
475. |
A food chain combine together to form a |
A. | Food Chain |
B. | Food Web |
C. | Chains |
D. | Single Chain |
Answer» C. Chains | |
476. |
In which consumers the competition for food is great? |
A. | Primary Producers |
B. | Predators |
C. | Herbivores |
D. | Carnivores |
Answer» C. Herbivores | |
477. |
Which non-metallic minerals are used in fertilizers for agriculture? |
A. | Nitrate, Phosphates, Potash |
B. | Nitrates, Phosphorous, Copper |
C. | Nitrates, Copper |
D. | Nitrates, Lead |
Answer» B. Nitrates, Phosphorous, Copper | |
478. |
What are examples of lentic water? |
A. | River, Lake, Ponds |
B. | Streams, river and springs |
C. | Lake, Pond and swamps |
D. | Rivers and springs |
Answer» D. Rivers and springs | |
479. |
How many types of consumers are there? |
A. | One |
B. | Two |
C. | Three |
D. | Four |
Answer» D. Four | |
480. |
Air pollution, trapped by leaves, through |
A. | Forests |
B. | Grasses |
C. | Plant |
D. | Animals |
Answer» B. Grasses | |
481. |
How many zones are in open ocean ? |
A. | 2 |
B. | 3 |
C. | 4 |
D. | 5 |
Answer» C. 4 | |
482. |
Why consumers cannot make their own food ? |
A. | Lack of favorable conditions |
B. | Lack of energy |
C. | Lack of chlorophyll |
D. | All of above |
Answer» D. All of above | |
483. |
How many categories of service provide of ecosystem to humans according to ‘Millennium Ecosystem Assessment (MEA)? |
A. | One |
B. | Two |
C. | Three |
D. | Four |
Answer» E. | |
484. |
Sea is salty. |
A. | True |
B. | False |
C. | May be True or False |
D. | Can't say |
Answer» B. False | |
485. |
We can find a marine ecosystem on a beach shore. |
A. | True |
B. | False |
C. | May be True or False |
D. | Can't say |
Answer» B. False | |
486. |
Which is a distinct biological community ? |
A. | plants |
B. | Biome |
C. | Nutrients |
D. | Soil |
Answer» C. Nutrients | |
487. |
Which gas is absorbed by the plants? |
A. | Oxygen |
B. | Carbandioxide |
C. | Natural Gas |
D. | Mathane gas |
Answer» C. Natural Gas | |
488. |
A carnivore which kills and eats other animals is called |
A. | Herbivores |
B. | Predators |
C. | Carnivore |
D. | Primary Producers |
Answer» B. Predators | |
489. |
Carbondioxide are combined in the cell to form |
A. | Enzyme |
B. | Sugar |
C. | Food |
D. | Nutrients |
Answer» C. Food | |
490. |
Ecosystem was first proposed by A.G Tanslay in |
A. | 1937 |
B. | 1935 |
C. | 1945 |
D. | 1938 |
Answer» C. 1945 | |
491. |
Which precious metals and stones are used for jewelry and industrial cutting? |
A. | Diamonds |
B. | Gold |
C. | Copper |
D. | Lead |
Answer» B. Gold | |
492. |
More light and oxygen is available in which part of the ocean? |
A. | Deeper parts |
B. | Continental Shelf |
C. | Both a and b |
D. | None of these |
Answer» C. Both a and b | |
493. |
How much percent iron is found on the earths crust? |
A. | 5% |
B. | 2% |
C. | 1% |
D. | 3% |
Answer» B. 2% | |
494. |
Which non-metallic minerals are used in chemical industry? |
A. | Sulphur, salt, Potash |
B. | Sulphur,copper, Potash |
C. | Sulphur, Lead, Potash |
D. | Sulphur,Lead, Copper |
Answer» B. Sulphur,copper, Potash | |
495. |
How many major groups classified in decomposers? |
A. | One |
B. | Two |
C. | Three |
D. | Four |
Answer» C. Three | |
496. |
The process of making food by certain microbes create energy by some chemical reactions is known as_______________________ |
A. | Photosynthesis |
B. | Food chain |
C. | Chemosynthesis |
D. | Hetrosynthesis |
Answer» D. Hetrosynthesis | |
497. |
The grass is a producer. |
A. | True |
B. | False |
C. | May be True or False |
D. | Can't say |
Answer» B. False | |
498. |
The food chain level in autotrophy is_____________ |
A. | Primary |
B. | Secondary |
C. | Tertiary |
D. | Quaternary |
Answer» B. Secondary | |
499. |
The food chain from grass to hawk and again it comes back to grass with the help of fungi. In the above explain food chain, what is grass? |
A. | Producers |
B. | Consumers |
C. | Decomposers |
D. | Energy source |
Answer» B. Consumers | |
500. |
Graphical representation of trophic structure and function is known as |
A. | Ecological Pyramid |
B. | Ecosystem |
C. | Ecological Function |
D. | Environment |
Answer» B. Ecosystem | |