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How does cytokinin and auxin interact in the determination of organs in the developing plant embryo?
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- What is apical dominance? How do auxin and cytokinin interact in determining the growth of lateral buds?What are phase changes in plant development? What two groups of genes control the formation of the flower? What is the ABC hypothesis?(a) What is the mutant that helps us to understand the adaxial identity of leaf development and the laminar outgrowth? (b) What is the mutant phenotype? (c) Which kind of protein does this gene encode?
- What is the purpose of hilum in seeds?What are the effects brought by cytokinin in plants? Explain the partnerships between cytokinin with auxin and hormone mentioned in Question 3 a). (i) (ii) Write an account on interactions between gibberellins, indole acetic acid and abscisic acid in plant growth promotion and seed germination.What are the advantages and disadvantages of self and cross pollination? How are the structures of the pistil and stamen adapted for successful fertilization?
- What is vitrification? How stem cells and callus are different from each other?Plant cells communicate in a variety of ways to elicit cellular responses. In the figure below the plant is responding the presence of light with the release of auxin. Auxin was first discovered for its ability to promote growth in plants. It is a plant hormone that inhibits the lengthening and stimulate the formation of lateral roots and root hairs. (b) Explain the role that auxin has in eliciting the plant’s response.How two genes interact to produce seed colors in lentils?
- Using the 'ABC model' of floral development, what would you expect the flowers of a mutant plant to look like if both A & B gene function had been destroyed?How does the structure of a seed (ex. corn seed or bean seed) help facilitate the survival of the plant?Plant cells communicate in a variety of ways to elicit cellular responses. In the figure below the plant is responding the presence of light with the release of auxin. Auxin was first discovered for its ability to promote growth in plants. It is a plant hormone that inhibits the lengthening and stimulate the formation of lateral roots and root hairs. a) Describe the plant’s response to the presence of light. (refer to picture)