CSIR-UGC National Eligibility Test (NET) for Junior Research Fellowship and Lecturer-ship
PREVIOUS SOLVED QUESTIONS – 2011 DECEMBER CSIR – NET EXAM
1. wider niche and high efficiency of niche utilization 2. narrower niche and high efficiency of niche utilization 3.wider niche and low efficiency of niche utilization 4.narrower niche and low efficiency of niche utilization
Expln:- A generalist species is able to thrive in a wide variety of environmental conditions and can make use of a variety of different resources (for example, a heterotroph with a varied diet ). A specialist species can only thrive in a narrow range of environmental conditions or has a limited diet. Some species are highly specialized (the most extreme case being monophagy). Omnivores are usually generalists. Herbivores are often specialists, but those that eat a variety of plants may be considered….
1. fish 2. frogs 3.pelicans 4.bats
Expln:- Batrachochytrium dendrobatidis (or Bd for short) is a chytrid fungus that causes the disease chytridiomycosis. In the decade after it was first discovered in amphibians in 1998, the disease devastated amphibian populations around the world, in a global ….
1. High respiration rate 2. Inhibition by far-red light 3.High transpiration rate 4.Low photosynthetic rate
Expln:- Physiological characteristics of early and late successional plants
ATTRIBUTE EARLY SUCCESSIONAL LATE SUCCESSIONAL
Speed dispersed in time Well dispersed Poorly dispersed
Seed germination enhanced by light Yes No
Fluctuating temperatures Yes No
High NO3 Yes No
Inhibited by far-red light Yes No
High CO2 concentration Yes No ?
Light saturation intensity High Low
Light compensation point High Low
Efficiency at low light Low High
Photosynthetic rates High Low
Respiration rates High Low
Transpiration rates High Low
Stomatal & mesophyll resistances Low High
Resistance to water transport Low High
Recovery from resource limitation Fast Slow
Resource acquisition rates Fast Slow ?
1. Little residual soil activity 2. Ready translocation in phloem 3.Inhibition of a chloroplast enzyme catalyzing the synthesis of aromatic amino acids 4.Inhibition of early steps in the biosynthesis of branched chain amino acids
Expln:- Glyphosate acts as a competitive inhibitor of the enzyme Enolpyruvylshikimate phosphate synthase (EPSPS). This is a key enzyme in shikimic ….
1. Horizontal gene transfer 2. Adaptive mutations 3.DNA repair 4.Reverse transcription
1. Bicoid and Nanos 2. Bicoid and Hunchback 3.Bicoid and Caudal 4.Nanos and caudal
1. Farnesyl pyrophosphate 2. Geranyl pyrophosphate 3.Isopentyl pyrophosphate 4.Hydroxymethylglutaryl – CoA
1. Sepals and petals 2. Petals and stamens 3.Stamens and carpels 4.Sepals and carpels
1. Chloroplast and peroxisomes 2. Chloroplast and mitochondria
3.Mitochondria and peroxisomes 4.Golgi bodies and mitochondria
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