A farmer uses triazine herbicide to control pigweed in his field. For the first few years, the triazine works well and almost all the pigweed dies; but after several years, the farmer sees more and more pigweed. Which of these statements explains why the pigweed reappeared?

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#Question id: 10129

#Unit 6. System Physiology – Plant

Oxidation of water to form molecular oxygen is very difficult: The photosynthetic oxygen-evolving complex is the only known biochemical system that carries out this reaction which essential cofactor are involved in the water-oxidizing process?

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#Question id: 13221

#Unit 6. System Physiology – Plant

There are two main types of water-transporting cells in the Xylem,

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#Question id: 4702

#Unit 11. Evolution and Behavior

Which of the following is correct match?

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#Question id: 26913

#Unit 10. Ecological Principles

Metabolic rate of Ectotherm and endotherm with respect to variable temp, which of the following represented graph is correct?

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#Question id: 23310

#General Aptitude

If some student's parent make a complaint that the child has developed the excessive habit of telling-a-lie and never give due importance to home work, you will do