During the seismonastic movement in Mimosa pudica turgor changes occur in- (A) Leaflets (B) Stipules (C) Pulvinus leaf base (D) Petiole and stem
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- (a) What structure can be found in a cross-section of a stem, leaf, and root? (b) How do these structure help these parts to perform their function?What might happen to a root if the pericycle disappeared?Given that (a) xylem is located toward the upper epidermis in leaf veins and phloem is located toward the lower epidermis and (b) the vascular tissue of a leaf is continuous with that of the stem, suggest one possible arrangement of vascular tissues in the stem that might account for the arrangement of vascular tissue in the leaf.
- Illustrate (draw) and label : (a). A mature sporophyte, and male and female gametophytes of : i) a fern (gymnosperm) (b) A frondGiven below is an experimental setup to demonstrate a particular tropic movement in germinating seeds. Study the diagram and answer the questions that follow Perforated trough Moist sawdust - Germinating seed -Brick (i) Label the parts 1 and 2. (ii) Name the tropic movement shown by part 1. (iii) Part 1 is affected by two stimuli. Name them. Which one of the two is stronger? (iv) What is Thigmotropism ? Give one example. (v) What is meant by 'Positive' and 'Negative' tropic movements in plants?How can you differentiate pinnately compound leaf from a leafy branch? How does a pinnately compound leaf doffer from a palmately compound leaf? What are veins and what is/are their function/s?
- Which parts of the leaf would be emphasized and which would be reduced in each of the following: tendrils, spines, bud scales, scale leaves of a bulb, and succulent leaves of a desert plant?The vascular system in piants is made up of two tissues: phloem and xylem. (a) Mark on the image above the positions of the xylem and phloem. (b) Differentiate between these vascular tissues. (c) Identify and describe a recent technology used to determine plant structure.Why coes the root grow between the leaf axil and internode?