Description : The rapidly growing mass of phytoplankton coveting the surface water of a lake or pond is known as – (1) Eutrophication (2) Water bloom (3) Water pollution (4) Water hyacinth
Last Answer : (1) Eutrophication Explanation: Eutrophication is the ecosystem response to the addition of artificial or natural substances, such as nitrates and phosphates, through fertilizers or sewage, to an aquatic ... increase of phytoplankton in a water body as a response to increased levels of nutrients.
Description : The rapidly growing mass of phytoplankton covering the surface water of a lake or pond is known as?
Last Answer : Eutriphication.
Description : Pulsars are (1) stars moving towards the Earth (2) stars moving away from Earth (3) rapidly spinning stars (4) high temperature stars
Last Answer : rapidly spinning stars
Description : Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem? (a) Fish (b) Zooplankton (c) Frog (d) Phytoplankton
Last Answer : (a) Fish
Description : Vinaya while playing in garden observed a pond with a green coloured covering which was floating on the surface of water?
Last Answer : Vinaya while playing in garden observed a pond with a green coloured covering which was floating on the ... same. What her teacher must have told her?
Description : Pick up the correct statement from the following: (A) Phytoplankton contains photosynthetically active pigment (B) An increase of phytoplankton increases the back scattering in the green region ( ... rapidly (D) An increase of phytoplankton decreases the back scattering in the green region
Last Answer : Answer: Option D
Description : Addition oxcessive amounts of heat to a lake is referred to as - (1) Refrigeration effect (2) Green House effect (3) Thermal pollution (4) Heat Bloom
Last Answer : (3) Thermal pollution Explanation: Thermal pollution is defined as the addition of excess of undesirable heat to water thereby making it harmful to man, animal or aquatic life. A common ... . The change in ambient temperature of water decreases oxygen supply and affects ecosystem com-position.
Description : Addition oxcessive amounts of heat to a lake is referred to as : (1) Refrigeration effect (2) Green House effect (3) Thermal pollution (4) Heat Bloom
Last Answer : Thermal pollution
Description : Which type of lake is formed by volcanic activities ? (1) Lagoon (2) Fresh water lake (3) Cladera lake (4) Karst lake
Last Answer : Cladera lake
Description : The stagnant water at the bottom of a lake is called (1) Epilimnion (2) Mesolimnion (3) Metalimnion(4) Hypolimnion
Last Answer : Hypolimnion
Description : Which type of lake is formed by volcanic activities ? (1) Caldera lake (2) Karst lake (3) Lagoon (4) Fresh water lake
Last Answer : Caldera lake
Description : In an iceberg floating in the sea, out of 10 parts of its mass, how much will remain above the surface of the water? (1) 1 part (2) 2 parts (3) 4 parts (4) 6 parts
Last Answer : 1 part
Description : Atoll is a kind of (1) sand-dune (2) lake (3) sandbar (4) inland sea
Last Answer : inland sea
Description : Lake formed in a cut off river, meander is called: (1) Playa Lake (2) Meteoric Lake (3) Ox-Bow Lake (4) Crater Lake
Last Answer : Ox-Bow Lake
Description : Which of the following is a typical feature of river erosion in youthful stage ? (1) Ox-bow lake (2) Gorge (3) Valley in valley (4) Cut-bank
Last Answer : Gorge
Description : The dominant second trophic level, in a lake ecosystem, is (a) phytoplankton (b) zooplankton (c) benthos (d) plankton.
Last Answer : (b) zooplankton
Description : Natural sources of air pollution are (1) Forest fires (2) Volcanic eruptions (3) Dust storm (4) Smoke from burning dry leaves
Last Answer : Volcanic eruptions
Description : 'Green House Effect' means (1) Pollution in houses in tropical regions (2) Trapping of solar energy due to atmospheric oxygen (3) Trapping of solar energy due to atmospheric carbon dioxide (4) Cultivation in green houses so as to check pollution
Last Answer : Trapping of solar energy due to atmospheric carbon dioxide
Description : ‘Green Accounting’ means measuring the National Income of the country taking into account estimation of (1) the total forest area of the country (2) the destruction of forest cover of the country (3) pollution and environmental damage (4) area of reclaimed fallow land
Last Answer : pollution and environmental damage
Description : Which of the following weeds has been found effective in checking water pollution caused by industrial affluents? (1) Water hyacinth (2) Elephant Grass (3) Parthenium (4) Both (2) and (3)
Last Answer : (1) Water hyacinth Explanation: Plants that are resistant to crude oil toxicity such as black poplar and willows, as well as miscanthus grass (elephant grass) have been found to ... oliefera seeds and Parthenium hysterophorus plants are effective for the removal of industrial p011utants in water.
Description : Which of the following weeds has been found useful to check water pollution caused by industrial effluents? (1) Partheniurn (2) Elephant grass (3) Water hyacinth (4) Both (1) and (2)
Last Answer : (4) Both (1) and (2) Explanation: Parthenium and Elephant grass are useful to check water pollution caused by industrial effluents.
Description : Which of the following weeds has been found useful to check water pollution caused by industrial affluents? (1) Parthenium (2) Elephant grass (3) Water hyacinth (4) Both (1) and (2) above
Last Answer : (3) Water hyacinth Explanation: Around the world, there is an increasing trend in areas of land, surface waters and groundwater affected by contamination from industrial, military and agricultural activities due to either ignorance, lack of vision, or carelessness.
Last Answer : Both (2) and (3)
Description : Which of the following weeds has been found useful to check water pollution caused by industrial affluents ? (1) Parthenium (2) Elephant grass (3) Water hyacinth (4) Both (1) and (2) above
Last Answer : Water hyacinth
Description : Algal bloom results from – (1) Global warming (2) Salination (3) Eutrophication (4) Biomagnification
Last Answer : (3) Eutrophication Explanation: An algal bloom is a rapid increase or accumulation in the population of algae in freshwater or marine water systems, and are recognized by the discoloration in the ... body with nutrients, usually with an excess amount of nutrients. This is known as eutrophication.
Description : Algal bloom results in a) Global warming b) Salination c) Eutrophication d) Biomagnification
Last Answer : c) Eutrophication
Description : Algal bloom results from (1) Global warming (2) Salination (3) Eutrophication (4) Biomagnification
Last Answer : Eutrophication
Description : The sphere of living matter together with water, air and soil on the surface of the earth is known as (1) Lithosphere (2) Biosphere (3) Hydrosphere (4) Atmosphere
Last Answer : Biosphere
Description : A special type of well in which water rises automatically under the pressure of a column of water to the ground surface through a hole is known as (1) Artisian well (2) Spring (3) Hot spring (4) Geyser
Last Answer : Artisian well
Description : Contour ploughing helps in (1) stopping floods (2) growing crops (3) soil conservation (4) checking landslides (SSC Combined Matric Level (PRE)
Last Answer : soil conservation
Description : Which one of the following statements is not correct? (a) Offspring produced by the asexual reproduction are called clone. (b) Microscopic, motile, asexual reproductive structures are called zoospores. ( ... in the standing water, drains oxygen from water that leads to the death of fishes.
Last Answer : (c) In potato, banana and ginger, the plantlets arise from the internodes present in the modified stem.
Description : Breaking down of rock in situ is known as (1) Erosion (2) Weathering (3) Mass wasting (4) Degradation
Last Answer : Weathering
Description : The atmospheric layer farthest from the Earth’s surface is known as (1) Stratosphere (2)Exosphere (3) Ionosphere (4)Mesosphere
Last Answer : Exosphere
Description : The zone of Earth’s atmosphere immediately above its surface up to a height of about 16 kms above equator and 8 kms over the poles is known as : (1) Mesosphere (2) Thermosphere (3) Troposphere (4) Stratosphere
Last Answer : Troposphere
Description : The water in an open pond remains cool even in hot summer because (a) Of continuous evaporation of water (b) Water radiates heat more rapidly than the atmosphere (c) Water absorbs heat less rapidly than the atmosphere (d) Water absorbs heat more rapidly than the atmosphere
Last Answer : Ans:(c)
Description : A lake or pond community is also known as a: w) pelagic community (pron: pe-laj-ick) x) benthic community (pron: ben-thick) y) lentic community (pron: len-tick) z) lotic community (pron: lot-ick)
Last Answer : ANSWER: Y -- LENTIC COMMUNITY
Description : Two major factors are changing the face of today's communications. One of these factors is the fact that: A. Costs of promotion are rising. B. Mass markets are fragmented and ... Global communications are not growing rapidly enough. D. Marcom managers have achieved more power and control.
Last Answer : B. Mass markets are fragmented and marketers are shifting away from mass marketing.
Description : The word Biosphere refers to : (1) Zone of soil, water and air around earth capable of supporting the flora and fauna. (2) Part of earth surface which can support the flora (3) Parts of air around earth a where life can exist (4) Zone of water on earth which can support life.
Last Answer : Zone of soil, water and air around earth capable of supporting the flora and fauna.
Description : How much of world’s surface is covered by water? (1) 55% (2) 70% (3) 80% (4) 25%
Last Answer : 70%
Description : The area which is resistant to any massive structural transformation is called (1) rigid mass (2) ancient landmass (3) tectonic plate (4) shield
Last Answer : shield
Description : The rapid sliding of large masses of bed rocks is called : (1) Landslide (2) Earthquake (3) Weathering (4) Mass wasting
Last Answer : Landslide
Description : The mass of Jupiter is approximately (1) one tenth of the solar mass (2) one thousandth of the solar mass (3) one hundredth of the solar mass (4) half the solar mass
Last Answer : one thousandth of the solar mass
Description : The food chain refers to the transfer of energy from : (1) the interior of the earth to the surface (2) lower to higher latitudes (3) one organism to another (4) organisms of the land to those of the sea by means of river
Last Answer : one organism to another
Description : The gentle ‘seaward sloping’ surface from the coasts is called __________. (1) Continental shelf (2) Continental rise (3) Abyssal plains (4) Submarine ridges
Last Answer : Continental shelf
Description : The Ocean with the largest surface area is (1) Arctic Ocean (2) Atlantic Ocean (3) Indian Ocean (4) Pacific Ocean
Last Answer : Pacific Ocean
Description : The deepest surface depression on the earth is (1) Kurile Trench (2) Mariana Trench (3) Tonga-Kermadec Trench (4) Bentley Subglacial
Last Answer : Mariana Trench
Description : The amount of insolation received at a place on the surface of the earth depends upon: (1) its climate (2) the longitude of the place (3) its latitude (4) the altitude of the place
Last Answer : its latitude
Description : The layer of atmosphere close to the earth’s surface is called (1) Exosphere (2) Troposphere (3) Stratosphere (4) Ionosphere
Description : Airmass near to the earth’s surface is warmer because it (1) radiates heat (2) contains dust particles (3) is warmed by terrestrial radiation (4) is far from the sun
Last Answer : is warmed by terrestrial radiation
Description : Troposphere is the hottest part of the atmosphere because (1) it is closest to the Sun (2) there are charged particles in it (3) it is heated by the Earth’s surface (4) heat is generated in it
Last Answer : it is heated by the Earth’s surface