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To obtain virus-free healthy plants from a diseased one by tissue culture technique, which part/parts of the diseased plant will be taken?
Removal of shoot tips is a very useful technique to boost the production of tea leaves. This is because:
Match List-I with List-II regarding plant growth regulators and their functions:
Read the following statements on plant growth and development. Which of the following is incorrect?
One of the commonly used plant growth hormones in tea plantations is:
Removal of apical dominance by decapitation is utilised for:
Match the following concerning the activity/function and the phytohormone involved: Column-I (Activity/Function) Column-II (Phytohormone) (a) Fruit ripening (i) Abscisic acid (b) Herbicide (ii) Ethylene (c) Bolting (iii) Auxin (d) Stress hormone (iv) Gibberellic acid
The ability of plants to follow different pathways in response to environment leading to formation of different kinds of structures are called :
Match List-I with List-II: List-I (A) Auxin (B) Gibberellin (C) Cytokinin (D) Ethylene List-II (I) Promotes female flower formation in cucumber (II) Overcoming apical dominance (III) Increase in the length of grape stalks (IV) Promotes flowering in pineapple
The H-zone in the skeletal muscle fibre is due to:
Match List I with List II: List I A. Fibrous joints B. Cartilaginous joints C. Hinge joints D. Ball and socket joints List II I. Adjacent vertebrae, limited movement II. Humerus and Pectoral girdle, rotational movement III. Skull, don't allow any movement IV. Knee, help in locomotion
Match List-I with List-II: List-I A. Ethylene B. Cytokinins C. ABA D. Gibberellins List-II I. Increase length of stem II. Promotion of senescence and abscission III. Delaying leaf senescence IV. Inhibition of seed germination
You are given a tissue with its potential for differentiation in an artificial culture. Which of the following pairs of hormones would you add to the medium to secure shoots as well as roots?
Root development is promoted by:
Which of the following characteristics represent 'Inheritance of blood groups' in humans? a. Dominance b. Co-dominance c. Multiple allele d. Incomplete dominance e. Polygenic inheritance
The phenomenon which is influenced by auxin and also played a major role in its discovery is:
Which one of the following plants does not show plasticity?
Which one of the following pairs of chemical substances is correctly categorised?
Out of ‘X’ pairs of ribs in humans only 'Y' pairs are true ribs. Select the option that correctly represents values of X and Y and provides their explanation:
Let a wire be suspended from the ceiling (rigid support) and stretched by a weight $W$ attached at its free end. The longitudinal stress at any point of the cross-sectional area $A$ of the wire is: