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The meristem which occurs at the tips of...

The meristem which occurs at the tips of roots and shoots and produce primary tissues are called

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Apical meristems
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Each phase of a material can exits only in certain regions of pressure and temperature . P-T phase diagrams, in which pressure is plotted versus temperature, show the regions corresponding to various phases and phase transformations . P-V diagrams, on the other hand , can be used to study pressure volume relationship at a constant temperature. If the liquid and gaseous phases of a pure substances are heated together in a closed container, both the temperature and the vapor pressure will increase until a point is reached at which the two phases can no longer be distinguished from one another. The temperature and pressure at which this occurs are called the critical temperature and pressure. Exceeding either of these parameters, by itself ,will cause the "gas"//"liguid" phase transition to disappear. if the other variable is then changed as well, while the first variable is maintained above its critical point , a gradual transition will occur between the gaseous and liquid phases, with no clear boundary.(The liquid and solid phases, on the other hand , maintain a distinct boundary at all pressure above the triple point). Shown in figure is a combined P-T phase diagram for material A and B . Which is true about the substance in figure?

ALLEN -ANATONY OF FLOWERING PLANTS -Exercise
  1. (A) In plants is largely restricted to specialised reigions of active ...

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  2. The term meristem is derived from (A) word meristos, which means (B)

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  3. The meristem which occurs at the tips of roots and shoots and produce ...

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  4. Given figure represents L.S. of shoot apex. In which labelled regions ...

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  5. * Cells are generally isodiametric * Cells may be spherical, oval, r...

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  6. In the given figure, laballed structure 'A' is-

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  7. Permanent tissues which are made up of more than one type of cells and...

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  8. Tracheids are elongated cells with thick and (A) walls ad (B) ends.

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  9. The presence of vessels in xylem is characteritics feature of (A)

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  10. Which xylem element have highly thickned walls and obliterated central...

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  11. Which xylem element store food material in the form of starch or fats ...

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  12. Given figure represents L.S. of phloem tissue. In which labelled struc...

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  13. Plant group in which phloem is composed of sieve tube elements, compan...

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  14. Phloem elements which are long, tube-like structures, arranged longitu...

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  15. A mature sieve element possesses a peripheral cytoplasm and a large (A...

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  16. The functions of (A) are controlled by the (B) of companion cells.

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  17. The protophloem has (A) sieve tubes whereas metaphloem has (B) sieve t...

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  18. What is meant by tissue ? Which are two main types of tissue ?

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  19. Phloem fibre are made up of (A)cells. These are generally absent in th...

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  20. Epidermal cell are (A) with a small amount of (B) and large vacuole.

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