MCQOPTIONS
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MCQOPTIONS
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 | |