Explore topic-wise MCQs in Science.

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.

401.

What are needed to complete a photosynthesis process?

A. Water and Air
B. Enzyme and Energy
C. Soil and moisture
D. Nutrients
Answer» C. Soil and moisture
402.

Food webs derive their energy from sunlight.

A. True
B. False
C. May be True or False
D. Can't say
Answer» B. False
403.

Tertiary consumers in ponds, feed on

A. Big fishes
B. Plants
C. Planktons
D. Decomposers
Answer» B. Plants
404.

An average annual precipitation in tropical rain forest, quantity exceeded ups

A. 12C
B. 18C
C. 22C
D. 6C
Answer» C. 22C
405.

What kind of climate we can find in the Thar desert?

A. Cold
B. Dry
C. Cool
D. Moist
Answer» C. Cool
406.

Which form of Sun’s energy is trapped by the producers in the energy flow?

A. Light energy
B. Chemical energy
C. Wind energy
D. Pressure energy
Answer» B. Chemical energy
407.

Which is the first process in ecological succession?

A. Nudation
B. Migration
C. Ecesis
D. Aggregation
Answer» B. Migration
408.

In which conference, the governments of coastal countries agreed to established zones of 200 nautical miles around their shores?

A. United Nation Law of Seas
B. United Nations
C. UNESCO
D. World Bank
Answer» B. United Nations
409.

Abnormal properties of hydrogen are due to

A. Tripolic movement
B. Hydrogen bonding
C. High evaporation
D. High temperature
Answer» C. High evaporation
410.

Which organisms feed on the flash of herbivores?

A. Carnivores
B. Herbivores
C. Omnivores
D. Zooplanktons
Answer» B. Herbivores
411.

What would happen if earth had no atmosphere ?

A. Earth would be below freezing
B. There would be no existence
C. There would be no length of the day
D. All of above
Answer» C. There would be no length of the day
412.

When the population of all the species are add ad together are called

A. Population
B. Community
C. Biosphere
D. Ecosystem
Answer» C. Biosphere
413.

Detrivores include herbivores, primary carnivores and

A. Producers
B. Omnivores
C. Detrivores
D. Grazing food chain
Answer» C. Detrivores
414.

Oceans occupy what percent of earth's surface?

A. 80%
B. 50%
C. 70%
D. 30%
Answer» D. 30%
415.

All the organism produce more organism so that the competition between is

A. Unavoidable
B. Voidable
C. Its continual
D. All of these
Answer» B. Voidable
416.

What is the average net primary productivity in a natural rainforest ?

A. 4200 grammes/m²/year
B. 2000 grammes/m²/year
C. 3200 grammes/m²/year
D. 2200 grammes/m²/year
Answer» E.
417.

Standing water 'ecosystem' is known as

A. Running water ecosystem
B. Lentic aquatic ecosystem
C. Lotic ecosystem
D. Lakes ecosystem
Answer» C. Lotic ecosystem
418.

What is input of naturally subsidized solar powered ecosystem?

A. 10,000 to 90,000kcal/m² per year
B. 10,000 to 80,000kcal/m² per year
C. 10,000 to 40,000kcal/m² per year
D. 20,000 to 40,000kcal/m² per year
Answer» D. 20,000 to 40,000kcal/m² per year
419.

What is called for the term in which all the living organisms that occupy an area undergoing primary succession in the beginning stages?

A. Climax community
B. Settled community
C. Dense community
D. Pioneer community
Answer» E.
420.

Which food is mainly used for the energy in the cells?

A. Carbohyderates
B. nutrients
C. Glocose
D. Ezymes
Answer» D. Ezymes
421.

What is called for the term used to express a community in its final stage of succession?

A. End community
B. Final community
C. Climax community
D. Dark community
Answer» D. Dark community
422.

Into how many areas the energy that is received by organisms during energy transfer is converted?

A. One
B. Two
C. Three
D. Four
Answer» D. Four
423.

Which process occurs after a volcanic eruption?

A. Primary succession
B. Secondary succession
C. Nitrogen fixation
D. Oxidation
Answer» C. Nitrogen fixation
424.

Species diversity hurts ecological succession.

A. True
B. False
C. May be True or False
D. Can't say
Answer» C. May be True or False
425.

Soil changes due to erosion is an example of which of the following succession?

A. Allogenic succession
B. Autogenic succession
C. Computational succession
D. Emigrational succession
Answer» B. Autogenic succession
426.

Simple inorganic substances released into environment is reused by

A. Decomposers
B. Producers
C. Omnivores
D. Herbivores
Answer» C. Omnivores
427.

Where the overfishing problems has started rising?

A. Southern Ocean
B. Pacific Ocean
C. Arctic
D. Antarica
Answer» B. Pacific Ocean
428.

In which ecosystem sun energy is replaced by highly concentrated potential energy of chemicals and fuels?

A. Man subsidized solar power ecosystem
B. Unsubsidized natural solar powered ecosystem
C. Naturally subsidized solar powered ecosystem
D. Fuel power ecosystem
Answer» E.
429.

Which of the following condition is true for food web?

A. A food web only follows just one path
B. A food web ends with a producer
C. A food web starts with a consumer
D. A food web shoes many paths plants and animals connected.
Answer» E.
430.

Green plants use water, sunlight and carbondioxide to form

A. Glocose
B. Fructose
C. Enzyme
D. Nutrients
Answer» B. Fructose
431.

How much water is contained by hydrosphere?

A. 1660 million cubic km
B. 1560 million cubic km
C. 1460 million cubic km
D. 1360 million cubic km
Answer» E.
432.

Large carnivores which rely for food on small carnivores are known as

A. Primary Producers
B. Secondary Producers
C. Tertiary Consumers
D. Predators
Answer» D. Predators
433.

The single celled algae are

A. Phytoplankton
B. Zooplankton
C. Microorganism
D. Herbivores
Answer» B. Zooplankton
434.

Oxides of Nitrogen causes what health problems in humans?

A. Bronchitis Asthma
B. Heart issues
C. Skin Cancer
D. Lung disease
Answer» B. Heart issues
435.

Herbivores are known as

A. Primary Producers
B. Secondary Producers
C. Consumers
D. Herbivores
Answer» B. Secondary Producers
436.

In which of the following place we can find the cold deserts?

A. Bangalore
B. Chennai
C. Himalaya
D. Rajasthan
Answer» D. Rajasthan
437.

In man subsidized powered ecosystem, power or energy input by man is, in form of

A. Fertilizers and machines
B. Tides and waves
C. waves and currents
D. Nuclear energy
Answer» B. Tides and waves
438.

How countries can manage fish stocks in their EEZs?

A. Quotas
B. Areas
C. United Nation Law of Seas
D. Seats
Answer» B. Areas
439.

'Folsom bottles' were created by

A. Prof.Claire Folsom
B. Edward Suess
C. Ed Shareen
D. Folsom
Answer» B. Edward Suess
440.

In which state water is in its purest form?

A. Evaporation state
B. Solid state
C. Liquid state
D. Gas State
Answer» B. Solid state
441.

EU stands for

A. European Union
B. Expanded universe
C. eastern University
D. All of these
Answer» B. Expanded universe
442.

Where can we find the most feared spider in the world ‘Tarantulas’?

A. In deserts
B. In mountains
C. In tropical rain forests
D. In grassland forest
Answer» D. In grassland forest
443.

Why Norway voted to stay out of EU?

A. To control over its marine resources
B. Laws doesn?t benefits them anymore
C. Both a and b
D. None of these
Answer» B. Laws doesn?t benefits them anymore
444.

What is called for the succession driven by the biotic components of an ecosystem?

A. Allogenic succession
B. Autogenic succession
C. Computational succession
D. Migration succession
Answer» C. Computational succession
445.

What are examples of fuel powered ecosystem?

A. Deserts
B. Coastal estuary
C. Tropical rain forests
D. Cities, Suburbs and industrial parks
Answer» E.
446.

Tropical rainforests, Monsoon forests, Savanna grassland, Deserts, taiga and tundra are the example of

A. Marine Ecosystem
B. Land Ecosystem
C. Biomes
D. Biosphere
Answer» C. Biomes
447.

How many types of ecological succession are there?

A. 3
B. 2
C. 5
D. 4
Answer» C. 5
448.

Algae, green plants and photosynthetic bacteria are:

A. Autotrophic organisms
B. Heterotrophic
C. Decomposers
D. Consumers
Answer» B. Heterotrophic
449.

Chemical energy that is stored in primary producers is in form of

A. Organic molecules
B. Inorganic compounds
C. Green plants and Algae
D. Omnivores
Answer» B. Inorganic compounds
450.

Humans are dependent on aquatic ecosystem.

A. True
B. False
C. May be True or False
D. Can't say
Answer» B. False