18. Ecology

Q- Path of energy flow in an ecosystem is
(a) Herbivorous → Producers Carnivorous → Decomposer
(b) Herbivorous → Carnivorous Producers → Decomposer
(c) Producer → Carnivorous Herbivorous → Decomposer
(d) Producer → Herbivorous Carnivorous → Decomposer
Ans: (d)

Q- Fossilization can occur where
(a) Animals are buried by natural process
(b) Animals are destroyed by scavengers
(c) Animals are eaten by predators
(d) Animals are destroyed by environmental condition
Ans: (a)

Q- 10% law of energy transfer in food chain was given by
(a) Lindemann (b) Stanley
(c) Tansley (d) Weismann
Ans: (a)

Q- Which one lacks both root and stomata?
(a) Hydrophytes (b) Mesophytes
(c) Hygrophytes (d) Halophytes
Ans: (a)

Q- Plants grown along sea coast are called
(a) Hydrophytes (b) Xerophytes
(c) Mesophytes (d) Halophytes
Ans: (d)

Q- Main component of Mangroove plants is
(a) Rhizophora (b) Ficus
(c) Mangifera (d) Prospus
Ans: (a)

Q- Which one of the following harmful elements tobacoo exists in tobacoo?
(a) Morphine
(b) Heroin
(c) Nicotine
(d) None of the above
Ans: (c)

Q- In a ecosystem the largest number is that of
(a) Primary producer
(b) Primary consumer
(c) Secondary consumer
(d) Decomposer
Ans: (a)

Q- In a food chain energy transfer
(a) From river to earth
(b) Lower lattitude to higher lattitude
(c) From one organism to other organism
(d) None of the above
Ans: (c)

Q- Ecosystem is
(a) Always open
(b) Always closed
(c) Both open and closed depending upon community
(d) Both open and closed depending upon biomass
Ans: (c)

Q- The importance of ecosystem lies is
(a) Cycling of material
(b) Flow of energy
(c) Both (a) and (b)
(d) Its biomass
Ans: (c)

Q- An association of individuals of different species living in the same habitat and having functional interactions is
(a) Population
(b) Ecological niche
(c) Biotic community
(d) Ecosystem
Ans: (c)

Q- Two components of ecosystem are
(a) Herb and shurb
(b) Abiotic and biotic
(c) Frog and Human
(d) Plant and animal
Ans: (b)

Q- Energy transfer from organism to organism in a natural community develops
(a) Biological control
(b) Food chain
(c) Food web
(d) Pyramid of energy
Ans: (c)

Q- Long roots system are found in xerophytes, because
(a) It gives mechanical support to plant
(b) To absorb water situated deep inside earth
(c) High temperature of soil cause growth in root
(d) Low temperature during night cause growth on root
Ans: (b)

Q- Which one of the following is abiotic component of ecosystem?
(a) Bacteria (b) Chlorella
(c) Water (d) Human
Ans: (c)

Q- Producer of an ecosystem
(a) Convert organic compound into inorganic compound
(b) Convert solar energy into chemical energy
(c) Use chemical energy
(d) Release energy
Ans: (b)

Q- Primary consumer of a ecosystem is
(a) Producer (b) Herbivorous
(c) Carnivorous (d) Decomposer
Ans: (b)

Q- Study of inter relationship between living organism and their environment is called
(a) Plant Geography
(b) Ecology
(c) Plant social science
(d) Ecosystem
Ans: (b)

Q- The term ecology is first given by
(a) Robbert brown
(b) Aristotal
(c) Khurana (d) Reiter
Ans: (d)

Q- In an ecosystem which one show one way passage
(a) Free energy (b) Carbon
(c) Nitrogen (d) Potassium
Ans: (a)

Q- Removal of top soil by air & water is called
(a) Erosion (b) Fossilisation
(c) Calcination (d) Salination
Ans: (a)

Q- Human body gets citric acid from which of the following resources?
(a) Lime
(b) Lemon
(c) Guava
(d) All of the above
Ans: (d)

Q- Epiphytes are found in those places where
(a) Temperature is very low
(b) Concentration of oxygen is high
(c) Rainfall occurs all over year
(d) Rainfall occurs according to season
Ans: (c)

Q- In dry regions, the leaf size of a tree becomes smaller. It is so to
(a) Reduce metabolism
(b) Reduce transpiration
(c) Maintain natural growth
(d) Protect plant from animals
Ans: (b)

Q- Van Mahotsav is associated with
(a) Cutting trees
(b) Planting tree
(c) Increase in crop
(d) Protection of plant
Ans: (b)

Q- Soil erosion can be controlled by
(a) By grazing more and more
(b) By removal of plant
(c) By afforestation
(d) By increased population
Ans: (c)

Q- Eco-mark is given to an Indian product which is
(a) Rich in protein
(b) Environment friendly
(c) Economically viable
(d) Pure and unadulterated
Ans: (b)

Q- Hydrophytes are
(a) Animal found in sea
(b) Aquatic plant
(c) A plant disease
(d) A root less plant
Ans: (b)

Q- If a tropical rain forest is removed, it does not regenerate quickly as compared to a tropical deciduous forest. This is because
(a) The soil of rain forest is deficient in nutrients
(b) Propagules of the trees in a rain forest have poor viability
(c) The rain forest species are slow growing
(d) Exotic species invade the fertile soil of rain forest
Ans: (a)

Q- The driving force of an ecosystem is
(a) Biomass (b) Producer
(c) Carbohydrate in producers
(d) Solar energy
Ans: (d)

Q- Which one of the following is a xerophytic plant?
(a) Mustard (b) Amarbel
(c) Karil (d) Neem
Ans: (c)

Q- Pyramid of energy in a ecosystem is
(a) Always inverted
(b) Always upright
(c) Spindle shape
(d) Both upright and inverted depending upon ecosystem
Ans: (d)

Q- Flood can be checked out
(a) By making slope
(b) By cutting forest
(c) By making dam and planting the tree
(d) None of the above
Ans: (c)

Q- Largest ecosystem of world is
(a) Grassland (b) Lake
(c) Sea (d) Forest
Ans: (c)

Q- Which one of the following organisms is likely to show the highest concentration of DDT, one it has been introduce into the ecosystem?
(a) Grasshopper (b) Toad
(c) Snake (d) Cattle
Ans: (c)

Q- We get solar energy from
(a) Moon (b) Sea
(c) Sun (d) Air
Ans: (c)

Q- When we eat the flesh of goat we are
(a) Primary consumer
(b) Secondary consumer
(c) Tertiary consumer
(d) None of the above
Ans: (b)

Q- Amount of energy transferred from one trophic level to next is
(a) 1.5% (b) 10%
(c) 15% (d) 20%
Ans: (b)

Q- Epiphytes are plant which depend on other plants for
(a) Food
(b) Mechanical support
(c) Shade (d) Water
Ans: (b)

Q- Study of inter-relationships between an entire community and its environment is
(a) Autecology
(b) Resource ecology
(c) Species ecology
(d) Synecology
Ans: (d)

Q- Plant and animal living in a particular area constitute
(a) Flora and Fauna
(b) Community
(c) Ecosystem
(d) Ecology
Ans: (b)

Q- Most of the desert plant bloom during night because
(a) Their blooming is controlled by low temperature
(b) They are sensitive to the phase of moon
(c) The desert insects eat away flower during day time
(d) The desert insects are active during night time
Ans: (d)

Q- An artificial ecosystem is represented by
(a) Pisciculture tank
(b) Agricultural land
(c) Zoo (d) Aquarium
Ans: (d)

Q- Reduced leaves and sunken stomata are the main feature of
(a) Epiphytes (b) Hydrophytes
(c) Xerophytes (d) Mesophytes
Ans: (c)

Q- Hydrophonics is related to
(a) Growth of plant without soil
(b) Growth of plant without water
(c) Conservation of water
(d) Relation of sound with water
Ans: (a)

Q- Which of the following is most stable ecosystem?
(a) Forest (b) Grassland
(c) Desert (d) Sea
Ans: (d)

Q- The ratio of forest area needed for ecological balance in India
(a) 11.1% (b) 22.2%
(c) 33.3% (d) 44.4%
Ans: (c)

Q- Phytron is a facility to
(a) Grow plants under disease free condition
(b) Conserve endangered species of plant
(c) Grow plants under controlled condition
(d) Induced mutations
Ans: (c)

Q- Mangroove are found in
(a) Dehradun (b) Kullu
(c) Sunderban (d) Western Ghat
Ans: (c)

Q- Flow of energy declines as it is passes from lower to higher trophic level. This is explained by
(a) First law of thermodynamics
(b) Second law of thermodynamics
(c) Newton’s second law
(d) Newton’s third law
Ans: (b)

Q- Crop sown soon after the onset of South-West monsoon in India is called
(a) Rabi (b) Kharif
(c) Rainfed (d) Dry farming
Ans: (b)

Q- Ecosystem may be defined as
(a) A species alongwith environment
(b) Plant found in water
(c) Plants found on land
(d) All plant and animal species along with environment
Ans: (d)

Q- The term ecosystem is first given by
(a) Reiter (b) Aristotle
(c) Tansely (d) Haeckel
Ans: (c)

Q- The Himalayan Range is very rich in species diversity. Which one among the following is the most appropriate reason for this phenomenon?
(a) It has a high rainfall that supports luxiuriant vegetative growth
(b) It is a confluence of different biogeographical bones
(c) Exotic and invasive species have been introduced in this region
(d) It has less human interference
Ans: (b)

Q- Autecology mean
(a) Effect of soil on plant
(b) Effect of temperature on plant
(c) Effect of transpiration on plant
(d) Relationship of species with their environment
Ans: (d)

Q- Main source of energy in a ecosystem is
(a) Sunlight
(b) Stored sugar in a plant
(c) Heat released during fermentation
(d) Heat released during respiration
Ans: (a)

Q- A food chain is made from
(a) Producer, consumer and decomposer
(b) Producer, carnivorous and decomposer
(c) Producer, and primary consumer
(d) Producer, herbivorous and carnivorous
Ans: (a)

Q- No trees are found in Tundra biome near polar region of northern hemisphere. This is due to
(a) Snowfall inhibits plant respiration
(b) Frozen ice beneath the surface soil restricts root growth
(c) Less wind movement and inadequate sunlight
(d) Low temperature which restricts development of reproductive organs.
Ans: (b)

Q- If all plants of the world die than all animal ultimately will die due to
(a) Lack of oxygen
(b) Lack of cold air
(c) Lack of food
(d) Animal will not die
Ans: (a)

Q- Which is the most stable ecosystem?
(a) Desert (b) Ocean
(c) Mountain (d) Forest
Ans: (b)

Q- An example of false fruit is
(a) Apple (b) Guava
(c) Mango (d) Tomato
Ans: (a)

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