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Biology MORPHOLOGY OF FLOWERING PLANTS · Clear filters

43 questions

Biology · MORPHOLOGY OF FLOWERING PLANTS

Consider the following statements about flower symmetry and floral parts: (A) When a flower can be divided into two equal radial halves in any radial plane passing through centre, it is actinomorphic. (B) Plum, rose and peach are examples of hypogynous flowers. (C) A trimerous, tetramerous or pentamerous flower has floral appendages in multiple of 3, 4 or 5, respectively. (D) Flowers with bracts—reduced leaf found at the base of the pedicel—are called bracteate. How many of the above statements are correct?

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Biology · MORPHOLOGY OF FLOWERING PLANTS

Consider the following statements: (A) In epiphyllous condition, stamens are attached to the petals as in brinjal. (B) Stamens united into one bundle or one bundle (monadelphous) is seen in china rose. (C) The stigma is usually at the tip of the style and is the receptive surface for pollen grains. (D) In basal placentation, the placenta develops at the base of ovary and a single ovule is attached to it, as in sunflower and marigold. Which of the above statements are correct?

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Biology · MORPHOLOGY OF FLOWERING PLANTS

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Placentation in mustard and Argemone is parietal, and the ovary is one-chambered initially but becomes two-chambered due to the formation of a false septum. Reason (R): In free central placentation, the ovules are borne on central axis and septa are absent. In the light of the above statements, choose the correct answer from the options given below:

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Biology · MORPHOLOGY OF FLOWERING PLANTS

Consider the following statements regarding the regions of the root: (A) The root is covered at the apex by a thimble-like structure called the root cap. (B) The cells of the region of meristematic activity are very large, thick-walled and with sparse protoplasm. (C) The cells proximal to the region of meristematic activity undergo rapid elongation and enlargement. (D) Root hairs are formed from epidermal cells in the region of maturation. Which of the above statements are correct?

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