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Dedifferentiation means
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Important Questions on Plant Growth and Development
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Typical growth curve in plants is:
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In tissue culture experiments, leaf mesophyll cells are put in a culture medium to form callus. This phenomenon may be called as:
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The vascular cambium normally gives rise to
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Secondary xylem and phloem in dicot stem are produced by
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Formation of interfascicular cambium and cork cambium from parenchyma is phenomenon of
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Plants having little or no secondary growth are
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Read the different components from (i) to (iv) in the list given below and tell the correct order of the components with reference to their arrangement from the outer side to the inner side in a woody dicot stem :
(i) Secondary cortex
(ii) Wood
(iii) Secondary phloem
(iv) Phellem
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Choose the correct statements.
(A) Assyrians recorded information of crop plants in the picture form.
(B) Nehemiah Grew studied the anatomy of plant tissue.
(C) Bouskein refers to cattle.
(D) Application of physical and chemical principles developed new branches of Botany like genetics.
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Name for the given phenomena events that occur during the growth of the plant
Production of tissues in woody dicotyledonous plants to perform specific function
Heterophylly at different stages of growth
Formation of meristems from parenchyma cells
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In the following diagrammatic representation showing stages of embryonic development, identify the type of growth phase labelled as and :
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Within the exponential phase of growth, if the initial surface area and the growth rate of a leaf are and respectively, the area of the leaf after days would range from
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Which among the following is not dedifferentiated?
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When a plant species is grown in shade tends to produce thinner leaves with more surface area, and when grown under abundant sunlight starts producing thicker leaves with reduced surface area. This phenomenon is an example of
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Which of the following are the part of the Periderm?
I. Duramen
II. Phellogen
III. Phellem
IV. Phelloderm
V. Alburnum
The correct answer is
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Plants follow different pathways in response to environment or phases of life to form different kinds of structures. This ability is called:
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Which one of the following plants does not show plasticity?
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The orientation to light of a non-motile organism or part of its body is called:
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Write the types of induced plant movements by an external and directional stimulus with example.
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Identify the exponential growth expression among the following.
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The process of growth is maximum during
