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NEET Questions / Zoology / Strategies for Enhancement in Food Production
Which of the following is NOT a characteristic of a stable climax community?
Wide niche specialization
High biomass
Low species diversity
Complex food webs
A species of beetle exhibits aposematic coloration. This coloration is MOST likely an adaptation to:
Attract mates
Camouflage itself from predators
Warn predators of its toxicity
Enhance its ability to thermoregulate
Which of the following factors does NOT contribute significantly to the process of speciation?
Geographic isolation
Reproductive isolation
Genetic drift
Random mating within a population
Somaclonal variation, a phenomenon observed in tissue culture, is primarily caused by:
Bacterial contamination of the culture medium
Exposure to high concentrations of plant growth regulators
Genetic changes during in vitro culture
Incomplete sterilization of the explant
The 'nurse tissue' technique in anther culture is primarily employed to:
Prevent bacterial contamination
Induce callus formation from the anther wall
Enhance the development of microspores into embryos
Promote the growth of haploid plantlets
Which technique is NOT typically used for the introduction of foreign DNA into plant cells during genetic transformation?
Agrobacterium-mediated transformation
Biolistic gene gun method
Electroporation using high-frequency sound waves
Protoplast fusion with genetically modified protoplasts
What is the primary aim of 'pureline selection' in plant breeding?
To create hybrids
To induce mutations
To obtain homozygosity
To introduce new genes
Emasculation is a crucial step in:
Self-pollination
Clonal propagation
Artificial hybridization
Mutation breeding
Which of the following is NOT a characteristic of species found in a stable community?
Relatively narrow niche
Stable population size
Strong interspecific interactions
Rapidly increasing population size
What is the relationship between species richness and community stability?
Always positive, more species always means more stability
Generally positive, greater richness often leads to greater stability
No relationship, richness and stability are independent
Generally negative, more species leads to more competition and instability
