MCQOPTIONS
Saved Bookmarks
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.
| 501. |
The process in which green plants and few organisms use sunlight to synthesize nutrients is known_________________ |
| A. | Chemosynthesis |
| B. | Photosynthesis |
| C. | Food chain |
| D. | Food web |
| Answer» C. Food chain | |
| 502. |
What is called for an organism which breakdown dead or waste matter into simpler substances? |
| A. | Decomposers |
| B. | Producers |
| C. | Insects |
| D. | Consumers |
| Answer» B. Producers | |
| 503. |
A consumer that feeds on other animals are known as carnivores. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 504. |
Which are known as most recognized players in the food chain and energy pyramid? |
| A. | Producers |
| B. | Consumers |
| C. | Decomposers |
| D. | Detritivores |
| Answer» D. Detritivores | |
| 505. |
In polypore which species caused poisoning in several plants? |
| A. | Ganoderma lucidum coll |
| B. | Trametes versicolor |
| C. | Hapslopilus nidulans |
| D. | Piptoporous betulinus |
| Answer» D. Piptoporous betulinus | |
| 506. |
What is the mode of nutrition in fungi? |
| A. | Saprophytic |
| B. | Heterotrophic |
| C. | Autotrophic |
| D. | Mixotrophic |
| Answer» B. Heterotrophic | |
| 507. |
To which category shelf fungi classified? |
| A. | Producers |
| B. | Consumers |
| C. | Decomposers |
| D. | Insects |
| Answer» D. Insects | |
| 508. |
The primary decomposers of most dead plant material are____________________ |
| A. | Algae |
| B. | Bacteria |
| C. | Fungi |
| D. | Insects |
| Answer» D. Insects | |
| 509. |
Decomposers and detritivores are same. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 510. |
All the life on earth depends on the single source of energy called |
| A. | Tidal Energy |
| B. | Wave energy |
| C. | Coal |
| D. | Sunlight |
| Answer» E. | |
| 511. |
Top crust of earth, in which continent and ocean basin rests, known as |
| A. | Biosphere |
| B. | Lithosphere |
| C. | Atmosphere |
| D. | Troposphere |
| Answer» C. Atmosphere | |
| 512. |
What is percentage of trace gases in atmosphere? |
| A. | 0.003 |
| B. | 0.0002 |
| C. | 0.029 |
| D. | 0.008 |
| Answer» C. 0.029 | |
| 513. |
For food,everthing depends directly or indirectly on |
| A. | Animals |
| B. | Green plants |
| C. | water |
| D. | Soil |
| Answer» C. water | |
| 514. |
How humans use grassland? |
| A. | To cultivate the land |
| B. | To feed livestock |
| C. | To grow thick forests |
| D. | Grassland is not at all useful for humans |
| Answer» C. To grow thick forests | |
| 515. |
From where does the decomposer receive energy? |
| A. | Producers |
| B. | Consumers |
| C. | Self generation |
| D. | Organic substrates |
| Answer» B. Consumers | |
| 516. |
Himalayan wildlife requires both forest and grassland ecosystems. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 517. |
Carrot->rabbit->fox is an example of_______________________ |
| A. | Food web |
| B. | Food chain |
| C. | Food cycle |
| D. | Food round |
| Answer» C. Food cycle | |
| 518. |
What is thickness of 'lithosphere' at ocean region? |
| A. | 10-20 km |
| B. | 10-12 km |
| C. | 12-18 km |
| D. | 10-18 km |
| Answer» C. 12-18 km | |
| 519. |
Bacteria obtains useful energy by oxidation of certain elements, such as: |
| A. | Nutrients |
| B. | Sulphur and iron |
| C. | Calcium |
| D. | Phosphorous |
| Answer» C. Calcium | |
| 520. |
Why rotational grazing pattern established? |
| A. | To preserve grassland ecosystem |
| B. | To destroy grassland ecosystem |
| C. | To graze in the tropical rain forests |
| D. | To grow grass in grassland ecosystem |
| Answer» B. To destroy grassland ecosystem | |
| 521. |
Lions, tigers are examples of |
| A. | Primary producers |
| B. | Primary consumers |
| C. | Secondary Consumers |
| D. | Quaternary Consumers |
| Answer» E. | |
| 522. |
The key feature of ecosystem is |
| A. | Interdependence |
| B. | Dependence |
| C. | Independence |
| D. | All of these |
| Answer» B. Dependence | |
| 523. |
Applied and basic aspects of environmental science require a solid foundation in |
| A. | Anthropogenic |
| B. | Natural Sciences |
| C. | Multi-disciplinary nature |
| D. | All of Above |
| Answer» C. Multi-disciplinary nature | |
| 524. |
What is called for the succession occurring within a microhabitat? |
| A. | Primary succession |
| B. | Nudation |
| C. | Serule |
| D. | Climax succession |
| Answer» D. Climax succession | |
| 525. |
The phytoplankton's synthesis their food through the process of |
| A. | photosynthesis |
| B. | Precipitation |
| C. | Eutrophication |
| D. | All of these |
| Answer» B. Precipitation | |
| 526. |
Fuel powered ecosystem is also known as |
| A. | Urban industrial Ecosystem |
| B. | Unsubsidized natural solar powered ecosystem |
| C. | Naturally subsidized solar powered ecosystem |
| D. | Man subsidized solar power ecosystem |
| Answer» B. Unsubsidized natural solar powered ecosystem | |
| 527. |
Transfering of energy from source of plants through a series of organisms is known as |
| A. | Food Chain |
| B. | Food Web |
| C. | Energy flow |
| D. | Biological system |
| Answer» B. Food Web | |
| 528. |
In which biome species diversity is high? |
| A. | Tropical rain forest |
| B. | Monsoon |
| C. | Desert |
| D. | Taiga |
| Answer» B. Monsoon | |
| 529. |
How the tropical rain forest gets the name? |
| A. | Due to less rain |
| B. | Due to heavy rain |
| C. | Due to moderate rain |
| D. | Due to no rain required |
| Answer» C. Due to moderate rain | |
| 530. |
Inorganic substances of abiotic factor includes: |
| A. | C, H, N, K, P, S |
| B. | Copper and silver |
| C. | Cadmium and cobalt |
| D. | Sulphur and carbon |
| Answer» B. Copper and silver | |
| 531. |
As compared to taiga, large animals seldom found in |
| A. | Temperate forests |
| B. | Tropical Rain Forests |
| C. | Monsoon forests |
| D. | Deserts |
| Answer» B. Tropical Rain Forests | |
| 532. |
Phytoplankton's convert the nutrients to organic compounds using |
| A. | Food |
| B. | Salts |
| C. | Sunlight and energy |
| D. | water |
| Answer» D. water | |
| 533. |
An 'ecosystem' is a small unit of |
| A. | Hydrosphere |
| B. | Biosphere |
| C. | Atmosphere |
| D. | Earth |
| Answer» C. Atmosphere | |
| 534. |
What is function of biosphere? |
| A. | Competes for resources |
| B. | Cause destruction |
| C. | to sustain life |
| D. | Living and non living organism |
| Answer» D. Living and non living organism | |
| 535. |
What does change over time and space? |
| A. | Ecological system |
| B. | Ecosystem |
| C. | Ecological Function |
| D. | Environment |
| Answer» C. Ecological Function | |
| 536. |
Why are fish stocks more plentiful on the continental shelf's? |
| A. | Due to rich souces of nutrients |
| B. | Due to high penetration of Sunlight |
| C. | Both a and b |
| D. | None of these |
| Answer» D. None of these | |
| 537. |
In the process of respiration the energy produced is reused for other functions such as |
| A. | Absorbing nutrients and repairing cell demage |
| B. | Photosynthesis |
| C. | Eutrophication |
| D. | Evaporation |
| Answer» B. Photosynthesis | |
| 538. |
What percent of land area is covered by desert? |
| A. | 0.4 |
| B. | 0.17 |
| C. | 0.34 |
| D. | 0.1 |
| Answer» C. 0.34 | |
| 539. |
Each stage in the chain where energy is exchanged is called |
| A. | Food Chain |
| B. | Food Web |
| C. | Respiration |
| D. | Trophic Level |
| Answer» E. | |
| 540. |
High concentration of SO₂, NO₂, CO₂, SPM in atmosphere, causes threats to |
| A. | Human health |
| B. | Environment |
| C. | Plants |
| D. | Soil |
| Answer» B. Environment | |
| 541. |
How many percent of grassland covered in terms of permanent pastures in India? |
| A. | 2.7% |
| B. | 3.7% |
| C. | 4.7% |
| D. | 5.5% |
| Answer» C. 4.7% | |
| 542. |
Flow of nutrients is___________________________ |
| A. | Unidirectional |
| B. | Rectangular |
| C. | Cyclic |
| D. | Triangular |
| Answer» D. Triangular | |
| 543. |
What is altitude of troposphere? |
| A. | 7km |
| B. | 8km |
| C. | 9km |
| D. | 10km |
| Answer» C. 9km | |
| 544. |
Which biome is defined by vegetation type that dominates community ? |
| A. | Biosphere |
| B. | Aquatic Biome |
| C. | Terrestrial Biome |
| D. | Hydrosphere |
| Answer» D. Hydrosphere | |
| 545. |
How much kilometer in stratosphere temperature remains constant? |
| A. | 20 km |
| B. | 30 km |
| C. | 50 km |
| D. | 100 km |
| Answer» B. 30 km | |
| 546. |
Which organism transforms complex organic compounds back into simple inorganic compound? |
| A. | Saprotrophs |
| B. | Consumers |
| C. | Producers |
| D. | Herbivores |
| Answer» B. Consumers | |
| 547. |
What are the new technology used for fishing? |
| A. | Sonar and satellite Navigation |
| B. | GIS |
| C. | Both a and b |
| D. | None of these |
| Answer» B. GIS | |
| 548. |
The rate at which the energy is absorbed or fixed by green plants? |
| A. | Loss |
| B. | Productivity |
| C. | Tropical Rain Forest |
| D. | Products |
| Answer» C. Tropical Rain Forest | |
| 549. |
Why plants in forests do not make use of all the light energy available to them? |
| A. | Because plants do not require energy |
| B. | Because plants are grown only in the winter season |
| C. | Because of the absence of chlorophyll |
| D. | Because sunlight doesn’t fall on the leaves fully |
| Answer» E. | |
| 550. |
In which of the following we can see fluctuation in the water level dramatically in different season? |
| A. | Coral reefs |
| B. | Brackish water |
| C. | Wetlands |
| D. | Deep oceans |
| Answer» D. Deep oceans | |