Q. Which of the following observations is not used as evidence to support the concept of endosymbiotic origin of chloroplasts and mitochondria?

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Q. The fluid matrix of a cell is called the

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Q. Which of the following elements is likely to form the least polar covalent bond with hydrogen?

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Q. The mitochondria were known in the nineteenth century to be osmotically active on the basis of evidence that

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Q. Mitochondria can be expected most numerous in

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Q. Why do some redox reactions in cells result in the transfer of electrons from a reductant with a higher standard redox potential to an oxidant with a lower standard redox potential?

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Q. Lysosomes are associated with

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Q. Which cell type is likely to have the most mitochondria?

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Q. Tonoplast is a membrane around

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Q. A cell without cell wall is called

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Q. Chemical energy is supplied to eukaryotic cells by

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Q. Which part of a plant contains the male sex cell?

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Q. A widely accepted explanation for transport of sugar in phloem is called

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Q. Phloem is composed of

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Q. The movement of most minerals, including potassium into root cells is by

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Q. The evaporation of water from leaves is called

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Q. Normally CO2 and O2 enter a plant by

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Q. The cohesion-tension theory of water movement helps to explain how water moves from soil into root?

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Q. When guard cells swell

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Q. Water moves into roots of plants by

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