[0:00]Question number one, ecology take into account. Option one, environmental factors only, plant adaptation only, effects of plant on environment, relationship between organisms and their environment.
[0:16]Correct answer is option four ecology we study relationship between organisms and their environment. Question number two, the term ecology was proposed by option one, Haeckel, Odum, Daubenmire, Reiter.
[0:38]Question number three, who defined ecology as the study of structure and function of nature? Option one, Haeckel, E.P. Odum, R. Misra, Taylor. Correct answer is option two, E.P. Odum defined ecology as the study of structure as well as function of nature.
[1:06]The correct answer will be option two. Question number four, who defined ecology as the reciprocal relationship of organisms and their environments? Option one, Misra, Haeckel, Odum, Lamarck. Correct answer is option B, Haeckel.
[1:30]Question number five, autecology means the study of effect of temperature on vegetation, effect of soil on vegetation, ecology of individual organism, effect of precipitation on vegetation. Correct answer is option three, autecology means the study of ecology of individual organisms.
[1:58]Question number six, synecology is the study of environment, plant community, individual, none of these. Correct answer is option two. The study of plant community is known as synecology.
[2:18]Question number seven, the transitional zone where two different communities meet is called niche, ecotone, ecad, ecotype. Correct answer is option two. It is known as ecotone zone.
[2:38]Question number eight, the science which deals with the management of plants, animals, soil, water and minerals is known as autecology, synecology, phytosociology or resource ecology. Correct answer is option four. It is known as resource ecology.
[3:06]Question number nine, what ecological factors are most strong determinants of various biomes, soil and wind, light and wind, temperature and precipitation, pH and humidity. Correct answer is option three, temperature as well as precipitation are the main strong determinants of various biomes.
[3:38]Question number 10, plants are killed in winter by frost, why? Option one, because respiration ceases at such a low temperature. Option two, because there is no transpiration. Option three, because no photosynthesis takes place at such a low temperature. Option four, because of desiccation and mechanical damage to the tissues. Its correct answer is option four. In winter, plants are killed by frost due to desiccation and mechanical damage to the tissues.
[4:19]Question number 11, which of the following is direct dominant ecological factor which affects the vegetation of a place? Option one, temperature, altitude, soil, wind. Correct answer is option one. Temperature is the main ecological factor that affects the vegetation of a place directly.
[4:47]Question number 12, major characteristic of the vegetation of locality are controlled by mainly by climate, by animals only, by altitude of a place only, by man only. Correct answer is option one. Major characteristics of vegetation or of a locality are controlled by climate.
[5:15]Question number 13, ecological factors work together, work in complex combination, work only indirectly, work singly. Correct answer is option two. Ecological factors always work in complex combinations.
[5:39]Question number 14, the hydrologic factor refers to gravitational water, snow, water, atmosphere. Correct answer is option three. Hydrologic factors means factors that are related to water.
[6:01]Question number 15, most dense layer of atmosphere vulnerable to pollution or life supporting zone of atmosphere is ionosphere, mesosphere, troposphere, stratosphere. Correct answer is option three. The most dense layer of atmosphere that is vulnerable to pollution is troposphere and troposphere is also life supporting zone.
[6:31]Question number 16, plant groups growing in zones where high temperature alternates with low temperature are called as mesotherms, megatherms, hekistotherms, microtherms. Correct answer is option one. Mesotherms are the plants that are growing in such zones where the high temperature alternates with low temperature.
[7:00]Question number 17, at what height in atmosphere the concentration of ozone is maximum? At 25 km, at 50 km, at 100 km, at 10 km. Correct answer is option one. At 25 km, the concentration of ozone layer is maximum.
[7:28]Question number 18, the alpine forests are classed under the plant group called hekistotherms, megatherms, mesotherms, microtherms. Correct answer is option one. Alpine forests are actually hekistothermic plants.
[7:51]Question number 19, biological rhythms of majority of organisms are modulated by soil factors, light, temperature, wind. Correct answer is option two. Light is the main stimulator behind different biological rhythms of organisms are modulated.
[8:21]Question number 20, when a plant of hot climate is transferred to colder regions, it gets an injury called thermal death, chilling, freezing, desiccation. Correct answer is option two. When a plant from hot climate is transferred to cold climate, it gets an injury that is known as chilling.
[8:50]Question number 21, flag trees are formed due to erosion and depression, slat spray, lodging, unidirectional winds. Correct answer is option four. Flag trees are formed due to unidirectional winds.
[9:14]Question number 22, which is the least porous soil, clay, loam, sand, peat/silt? Correct answer is option one. Clay soil is the least porous soil.
[9:34]Question number 23, in coarse textured soils, pore frequency is low, pore space is narrow, there is no soil air, water retaining capacity is high. Correct answer is option one. In coarse textured soil pore frequency is always low.
[9:59]Question number 24, which of the following does not occur in loam soil, sand, silt, chalk, sand? Correct answer is option three. Chalk does not occur does not present in loam soil.
[10:21]Question number 25, soils transported by air are called as residual soil, colluvial soil, eolian soil, aerial soil. Correct answer is option three. Eolian soil is the soil that is transported by means of air.
[10:44]Question number 26, edaphic factors are concerned with soil and their characteristics, rainfall, grazing by animals, competition among different species of plants. Correct answer is option one. Edaphic factors are the factors that are related to the soil and their characteristics.
[11:08]Question number 27, soil formation is initiated by the phenomenon of pedogenesis, laterization, weathering, gleization. Correct answer is option three. Weathering is responsible for soil formation.
[11:30]Question number 28, which soil is best for plant growth, clay soil, loamy soil, sandy soil, gravel soil? Correct answer is option two. Loamy soil is the best soil for plant growth.
[11:51]Question number 29, the term sub-soil generally refers to horizon R, horizon B, horizon A, horizon C. Correct answer is option two. Horizon B is generally considered as sub-soil.
[12:11]Question number 30, pedology is the study of locomotion of animals, soil erosion, soil formation, rock formation. Correct answer is option three. Soil for me the study of soil formation is known as pedology.
[12:32]Question number 31, the biological weathering occurs due to the action of carbon dioxide, oxygen, alkalies, acids. Correct answer is option four. Due to attack of acids biological weathering of rocks takes place.
[12:53]Question number 32, water logging occurs in clay soil, gravel soil, sandy soil, loam soil. Correct answer is option one. Water logging mostly occurs in clay soil that has least water holding capacity.
[13:14]Question number 33, plants absorb from the soil, capillary water, gravitational water, both capillary water and gravitational water, hygroscopic water. Correct answer is option one. Plant absorb capillary water from the soil.
[13:38]Question number 34, water held tightly in the form of a thin film on the surface of soil particle is known as hygroscopic water, gravitational water, capillary water, run away water. Correct answer is option one. Hygroscopic water is the water that is held tightly in the form of a thin film on the surface of soil particle.
[14:07]Question number 35, the term chesard refers to gravitational water, capillary water, water vapour, run off water. Correct answer is option two. Capillary water, there is a special term used that is called chesard.
[14:28]Question number 36, humus is important for plant growth because it is partially decomposed, it is derived from leaves, it is made up of dead organic matter. Option four, it is rich in nutrients and increases the water holding capacity of the soil. Correct answer is option four. Humus is important for plant growth because it increases the water holding capacity as well as it is rich in nutrients.
[15:03]Question number 37, plants growing on rocks are called as sciophytes, halophytes, lithophytes, psychrophytes. Correct answer is option three. Lithophytes are the plants that are growing on rocks.
[15:24]Question number 38, storage capacity of the soil is the extent to which it can hold hygroscopic plus bound water, capillary plus hygroscopic water, capillary water, gravitational water. Correct answer is option three. Storage capacity of the soil is the extent to which it can hold capillary water. So the more the soil will hold capillary water, the more will be its storage capacity.
