401. Ectomycorrhiza absorbs and stores N, P, K and Ca in:
A. Root hairs B. Fungal mantle
C. Host epidermis D. Host cortex
402. Sesbania rostrata is preferred as green manure over other species because:
ADVERTISEMENTS:
A. It grows quickly
B. It has extensive root system
C It possesses nodules on both stem and roots
D. It possesses leaf nodules
ADVERTISEMENTS:
403. Biological control means:
A. The control of harmful insects
B. The control of weeds
C. The control of pests and weeds through some specific organisms
ADVERTISEMENTS:
D. None of the above
404. Phosphobacterin contains:
A. Bacillus megatherium
B. Azospirillium lipoferum
ADVERTISEMENTS:
C. Bacillus polymyxa
D. Rhizobium meliloti
405. A biodegradable insecticide has been obtained from:
A. Sunflower B. Sweet Clover
ADVERTISEMENTS:
C. Marigold D. Opuntia
406. Antifeedant property is found in:
A. Margosa
B. Parthenium
ADVERTISEMENTS:
C. Chrysanthemum
D. Sesbania
407. ‘Devine’ and ‘College’ are two agricultural substances that are used as:
A. Biofertilizers
B. Natural insecticides
C. Insect hormones
D. Bioherbicides
408. Biopesticides include:
A. Bioherbicides
B. Bioinsecticides
C. Both (A) and (B)
D. Bioherbicides, Bioinsecticides and Biofertilizer
409. Sporeine was developed in:
A. Germany
B. France
C. U.S.A.
D. Russia
410. The requirement of fertilizers by the end of century would be:
A. 20 million tonnes
B. 80 million tonnes
C. 13 million tonnes
D. 9.2 million tonnes
411. The total consumption of fertilizers in India is about:
20 million tonnes
40 million tonnes
18.4 million Tonnes
9.2 million Tonnes
412. Transgenic crops are useful as they have genes of:
A. Nitrogen fixation
B. Smoother crop
C. Herbicide resistance
D. Both (B) and (C)
413. The neem is used as a natural insecticide because:
A. The extract of neem contains azadirachtin which acts as an antifeedant compound
B. It is significantly most effective than other pesticides
C. It is rapidly degradable in nature
D. Its cost of production is not high
414. The biological control of agricultural pests, unlike, chemical control is:
A. Self perpetuating
B. Polluting
C. Very expensive
D. Toxic
415. Mycorrhiza represents:
A. Antagonism
B. Endemism
C. Symbioiss
D. Parasitism
416. Nitrogen fixation is:
A. Nitrogen -> Ammonia
B. Nitrogen -> Nitrates
C. Nitrogen -> Amino acids
D. Both (A) and (B)
417. Leghaemoglobin occurs in:
A. Coralloid root
B. BGA
C. Around bacteriods
D. Mycorrhiza
418. BGA is chiefly used as fertilizer in:
A. Wheat
B. Paddy
C. Mustard
D. Gram
419. Which element plays an important role in nitrogen fixation?
A. Mn
B. Mo
C. Zn
D. Cu
420. In a geographic region the rainfall is low, temperature is high, the soil is loose and sandy with low water table. It is reasonable to expect there:
A. a grassy land
B. Screw pine forest
C. xerophytes vegetation
D. None of these
421. Soil erosion can be prevented by:
A. allowing herbivorous animals to graze excessively
B. growing plants to form a soil cover
C. making the land sloppy
D. increasing soil fertility
423. The great ocean is set in motion by:
A. rotation of moon
B. rotation of sun
C. dragging of wind over vast areas of sea surface
D. rise & cooling of air
424. Most of the clouds and the weather systems occurred in:
A. Mesosphere
B. Troposphere
C. Ionosphere
D. None of these
425. With an increase in altitude, the temperature gradually-
A. increase
B. decrease
C. both (A) and (B)
D. None of these
426. The process or ocean thermal energy conversion is based on:
A. The utilization of the potential of tidal
B. the utilization of the temperature differences between warm surface sea and cold deep sea water
C. temperature underneath the surface of earth
D. All of the above
427. At present, the generation of electricity is based mainly on the burning of:
A. fossils fuels
B. natural gas
C. CNG
D. garbage
428. Of the total water vapour potential of the world is:
A. only 1/6th has so far been developed
B. only 1/5th has so far been developed
C. only 1 /10th has so far been developed
D. None of above
429. The total potential water power of the world is estimated as:
A. 496 million watt
B. 969 million watt
C. 171 million watt
D. 200 million watt
430. A fuel having high ignition temperature is:
A. Wood
B. Petrol
C. LPG
D. CNG
431. The calorific value of fuel is expressed as:
A. kcal/m3
B. kcal/cm3
C. cal/m3
D. N/m2
433. The abundance and diversity of microorganisms in any ecosystem are influenced by:
A. oxygen demand
B. sewage fungus
C. gypsum quantity
D. bughouses
434. Chemical Oxygen Demand is:
A. the quantity of oxygen consumed in the oxidation of organic and inorganic matter in water under favorable conditions
B. the quantity of biological oxygen used by the micro-organisms to live under water
C. both of the above
D. None of the above
435. Main type/s of hauled container systems is/are:
A. trash-trailer container
B. tilt-frame container
C. both of these
D. None of these
436. The process in which the trash and garbage are burned in large furnace at high temperatures to get rid off much of the refuse as possible is:
A. landfills
B. high injection process
C. incineration
D. All of the above
437. The main problems with using the incineration process is/are:
A. burning trash
B. expelling huge amount of toxic pollution
C. both of the above
D. None of the above
438. When animals feed on other dead animals which had died naturally or had been killed by another animal, this relationship is termed as:
A. Scavenging
B. Predation
C. Competition
D. Symbiosis
439. Which of the following is NOT an advantage of sampling?
A. Sampling saves labour
B. Sampling cannot be a substitute for census
C. Sampling saves time and money
D. All of the above
440. The statistical device helps in analyzing the co variation of two or more variables:
A. Correlation
B. Regressions
C. Median
D. Standard deviation
441. The sampling method chosen when the members of special population are difficult to locate is:
A. dimensional sampling
B. snowball sampling
C. cluster sampling
D. All of these
442. The non-probability sampling is:
A. cluster sampling
B. stratified sampling
C. correlation
D. regression
443. The number of elements in the obtained sample is known as:
A. sampling
B. sample size
C. sample distribution
D. regression
445. The incorrect pair is:
A. Multistage in queries -> meant for big samples
B. Area sampling -> grouping the population and then selecting the groups
C. Deliberate -> non-probability sampling
D. None of the above
446. In testing of hypothesis, research and null hypothesis:
A. are invalid
B. exist together
C. one at a time
D. are same
447. Low levels of BOD in water bodies lead to the death of fishes and other microorganisms due to:
A. methane
B. hydrogen supplied
C. offensive sludge
D. All of these
448. Which of the following cause damage to the blood?
A. Ca B. Pb
C Mg D. Ar
449. Most poisonous pollutant in water is:
A. Zn
B. P04
C. Ar
D. CO2