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Secondary xylem and phloem in dicot stem are produced by
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Casparian strips occur in
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Pneumatophores occur in
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Which of the following statements is correct?
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Match the items given in Column I with those in Column II and select the correct option given below:
| Column I | Column II |
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| a. Herbarium | (i) It is a place having a collection of preserved plants and animals | | b. Key | (ii) A list that enumerates methodically all the species found in an area with brief description aiding identification | | c. Museum | (iii) Is a place where dried and pressed plant specimens mounted on sheets are kept | | d. Catalogue | (iv) A booklet containing a list of characters and their alternates which are helpful in identification of various taxa. |
a b c d
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Oxygen is not produced during photosynthesis by
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Which of the following elements is responsible for maintaining turgor in cells?
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Which of the following is a secondary pollutant?
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What type of ecological pyramid would be obtained with the following data?
Secondary consumer : 120 g
Primary consumer : 60 g
Primary producer : 10 g
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Stomata in grass leaf are
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