During which geological period was there an first definite evidence of land plants and algae dominant of many plants?

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#Question id: 1437

#Unit 4. Cell Communication and Cell Signaling

Exposure to benzo(a)pyrene is most frequently associated with which type of cancer?

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#Question id: 11433

#Unit 1. Molecules and their Interaction Relevant to Biology

An amino acid contains no ionizable group in its side chain (R). It is titrated from pH 0 to 14. Which of the following ionizable state is not observed during the entire titration in the pH range 0 - 14?

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#Question id: 32321

#Unit 1. Molecules and their Interaction Relevant to Biology

The standard free-energy change for given reactions, using the equilibrium constants given for the reactions at 25°C and pH 7.0, will be

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#Question id: 19153

#Unit 13. Methods in Biology

Ion exchange capacity of a resin is dependent on :-

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#Question id: 10702

#Unit 10. Ecological Principles

Species A has a large effect on community because of its abundance in community known as