Which One Of The Following Is Not A Biofertilizer?
a) Mycorrhiza b) Agrobacterium c) Rhizobium d) Nostoc Answer: b) Agrobacterium Explanation: Agrobacterium is a gene transfer agent.
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Which One Of The Following Statements Is Correct For Secondary Succession?
a) It begins on a bare rock b) It follows primary succession c) It occurs on a deforested site d)... View Article
Large Woody Vines Are More Commonly Found In?
a) Temperate forests b) Mangroves c) Alpine forests d) Tropical rainforests Answer: d) Tropical rainforests Lianas and epiphytes are more... View Article
Eutrophication Is Often Seen In?
a) Deserts b) Ocean c) Freshwater lakes d) Mountains Answer: c) Freshwater lakes Sol. Answer (3)
Secondary Sewage Treatment Is Mainly A?
a) Biological process b) Chemical process c) Mechanical process d) Physical process Answer: a) Biological process
Mass Of Living Matter At A Trophic Level In An Area At Any Time Is Called?
a) Detritus b) Standing crop c) Humus d) Standing state Answer: b) Standing crop
In Which One Of The Following Pollinations Is Autogamous?
a) Cleistogamy b) Xenogamy c) Chasmogamy d) Geitonogamy Answer: a) Cleistogamy Cleistogamy favours self-pollination.
What Would Be The Number Of Chromosomes Of The Aleurone Cells Of A Plant With 42 Chromosomes In Its Root Tip Cells?
a) 42 b) 84 c) 63 d) 21 Answer: c) 63 Aleurone is triploid and root tip is diploid.
Filiform Apparatus Is A Characteristic Feature Of?
a) Suspensor b) Egg c) Zygote d) Synergid Answer: d) Synergid At the micropylar ends of synergids, these are finger-like... View Article
A Prokaryotic Autotrophic Nitrogen Fixing Symbiont Found In?
a) Cicer b) Pisum c) Cycas d) Alnus Answer: c) Cycas
Cam Helps The Plants In?
a) Secondary growth b) Conserving water c) Disease resistance d) Reproduction Answer: b) Conserving water
The Cork Cambium, Cork And Secondary Cortex Are Collectively Called?
a) Phellem b) Phelloderm c) Phellogen d) Periderm Answer: d) Periderm
In Land Plants The Guard Cells Differ From Other Epidermal Cells In Having?
a) Chloroplasts b) Endoplasmic reticulum c) Mitochondria d) Cytoskeleton Answer: a) Chloroplasts The guard cells are special chlorophyllous epidermal cells.
Ground Tissue Includes?
a) Epidermis and cortex b) All tissues internal to endodermis c) All tissues except epidermis and vascular bundles d) All... View Article
Which One Of The Following Elements In Plants Is Not Remobilised?
a) Phosphorus b) Potassium c) Calcium d) Sulphur Answer: c) Calcium
The Function Of Leghemoglobin In The Root Nodules Of Legumes Is?
a) Inhibition of nitrogenase activity b) Nodule differentiation c) Oxygen removal d) Expression of nif gene Answer: c) Oxygen removal... View Article
Nitrifying Bacteria.
a) Convert free nitrogen to nitrogen compounds b) Oxidize ammonia to nitrates c) Convert proteins into ammonia d) Reduce nitrates... View Article
Which One Of The Following Also Acts As A Catalyst In A Bacterial Cell?
a) 23 sr RNA b) 5 sr RNA c) snRNA d) hn RNA Answer: a) 23 sr RNA
A Collection Of Plants And Seeds Having Diverse Alleles Of All The Genes Of A Crop Is Called?
a) Gene library b) Genome c) Germplasm d) Herbarium Answer: c) Germplasm Explanation: Germplasm could be picked as plantlets or... View Article
Mutations Can Be Induced With?
a) Gamma radiations b) Ethylene c) Infrared radiations d) I A A Answer: a) Gamma radiations
