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Q: Define or describe a Sclerenchyma tissue.
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- Which type of the following play a role in the gravitropic response of plants according to the statolith hypothesis? amyloplasts chloroplasts receptors calcium ions O O O OEXPERIMENT: INITIATION OF CALLUS AND CELL SUSPENSION IN SELECTED PLANTS Please make a general introduction paragraph about this experiment.How is plant cell totipotency being used for plant propagation and improvement?
- Discuss how the property of plant cell totipotency has been utilised for plant propagation and improvement?(please refer to XII NCERT)Plant Physiology Define or describe a Parenchyma tissue.Hormones and signal pathways Complete the following paragraph to describe signal transduction as it occurs within plants. Choices may be used more than once or not at all. Chemical signals called play an important role in a plant's ability to respond to a stimulus. These signals bind to receptors, the first step in a cellular response called a may be located in the plasma membrane, the cytoplasm, the nucleus, or the endoplasmic reticulum. The series of relay proteins or enzymes activated by the hormone binding the receptor make up the Some responses are immediate, while others require a like Ca*, to initiate a cellular response. The result of the transduction pathway is a which is often the transcription of specific genes, resulting in some measurable change. hormones reflex arc signal transduction pathway Signal transducers second messenger response Receptor proteins first messenger
- Describe a modified structure and function of the following plant organs: Leaf - Stem - Root -Plant Physiology Define or describe a Collenchyma tissue.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)