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Can a nickel spatula be used to stir copper sulphate solution? Justify your answer.
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Match the following.
| 1. Symplastic pathway | (a) Leaf |
| 2. Transpiration | (b) Plasmodesmata |
| 3. Osmosis | (c) Pressure in xylem |
| 4. Root Pressure | (d) Pressure gradient |
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The phloem is responsible for the translocation of food.
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How do plants absorb water? Explain.
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When any dry plant material is kept in water, they swell up. Name and define the phenomenon involved in this change.
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Match Column I with Columns II and III.
| Column I | Column II | Column III |
| Auxin | Gibberella fujikuroi | Abscission |
| Ethylene | Coconut milk | Intermodal elongation |
| Abscisic acid | Coleoptile tip | Apical dominance |
| Cytokinin | Chloroplast | Ripening |
| Gibberellins | Fruits | Cell division |
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Match the following hormones with their deficiency states.
| Hormones | - | Disorders |
| a) Thyroxine | - | Acromegaly |
| b) Insulin | - | Tetany |
| c) Parathormone | - | Simple goitre |
| d) Growth hormone | - | Diabetes insipidus |
| e) ADH | - | Diabetes mellitus |
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What are chemical messengers?
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Susan’s father feels very tired and frequently urinates. After clinical diagnosis, he was advised to take an injection daily to maintain his blood glucose level. What would be the possible cause for this? Suggest preventive measures.
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A recessive factor is altered by the presence of a dominant factor.
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Each gamete has only one allele of a gene.
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Hybrid is an offspring from a cross between genetically different parents.
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Plotting a graph for momentum on the Y-axis and time on X-axis. the slope of the momentum-time graph gives
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In which of the following sport the turning of the effect of force used
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One kilogram-force equals to
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To produce a displacement ______ is required.
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Turning a nut with a spanner having a short handle is so easy than one with a long handle.
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A mechanic unscrew a nut by applying a force of 140 N with a spanner of length 40 cm. What should be the length of the spanner if a force of 40 N is applied to unscrew the same nut?
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The refractive index of four substances A, B, C, and D are 1.31, 1.43, 1.33, 2.4 respectively. The speed of light is maximum in
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