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- 5. Define what a plant hormone is. Also, explain, using an example for each, of how hormones can both work together and work against each other when they are received by a particular part of a plant.B. Match the hormones that are supposed to be added to a plant in order to achieve the following results: a. Auxin b. Gibberellin c. Cytokinin d. Abscisic Acid e. Ethylene 19. unpollinated flowers are treated with this hormone so ovary enlarges and becomes a seedless fruit 20. substitute for temperature or light cues in plant seeds to get them to germinate 21. black spots on banana skin are spots where these are produced inducing ripening 22. seeds/bulbs stay dormant during winter to ensure survival of the plant when it germinates 23. most grape growers spray this in vines to increase length of branches between fruit clusters for more air spaces among fruits to lower fungal infections 24. sprayed on cut leaves and stems so they will remain green longer while unsprayed leaves will turn yellow and dieB. Match the hormones that are supposed to be added to a plant in order to achieve the following results: a. Auxin b. Gibberellin c. Cytokinin d. Abscisic Acid e. Ethylene 19. unpollinated flowers are treated with this hormone so ovary enlarges and becomes a seedless fruit 20. substitute for temperature or light cues in plant seeds to get them to germinate 21. black spots on banana skin are spots where these are produced inducing ripening 22. seeds/bulbs stay dormant during winter to ensure survival of the plant when it germinates 23. most grape growers spray this in vines to increase length of branches between fruit clusters for more air spaces among fruits to lower fungal infections 24 spraved on cut leaves and stems so they will remain green longer while unsprayed leaves will tum yellow and die
- 7. Which of the following is correct about plant shoots? a. Plant shoots are negatively phototropic and positively gravitropic. b. Plant shoots are negatively hydrotropic and positively gravitropic. c. Plant shoots are positively phototropic and negatively gravitropic. d. Plant shoots do not display any major tropisms. 8. In an unevenly irrigated soil, how would auxins affect the growth of the root and the stem of a plant? a. The root would grow in the direction where water is abundant and so would the stem. b. The root would grow in the direction where water is abundant while the stem would grow upwards. c. The root would grow in the direction where water is abundant while the stem would grow in the opposite direction. d. Both would grow without changing direction regardless of the abundance of water. 9. Which of the following best describes tropism? a. Tropism is the response of a plant to grow toward or away from a stimulus. b. Tropism is the mechanism by which a plant…7. Which of the following is correct about plant shoots?a. Plant shoots are negatively phototropic and positively gravitropic.b. Plant shoots are negatively hydrotropic and positively gravitropic.c. Plant shoots are positively phototropic and negatively gravitropic.d. Plant shoots do not display any major tropisms.8. In an unevenly irrigated soil, how would auxins affect the growth of theroot and the stem of a plant?a. The root would grow in the direction where water is abundant andso would the stem.b. The root would grow in the direction where water is abundantwhile the stem would grow upwards.c. The root would grow in the direction where water is abundantwhile the stem would grow in the opposite direction.d. Both would grow without changing direction regardless of theabundance of water.2. 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. (b) Explain the role that auxin has in eliciting the plant's response. (c) Explain how the behavioral responses of the plant affect their overall fitness.
- 7. Name the gaseous plant hormone and describe three different actions of this hormone in plants. 8. Explain how the auxin:cytokinin ratio affects plant growth. 9. Which plant hormones are considered as growth inhibitorss? Why? 10. how does auxin promote phototropism?А D If the auxin concentration in A is 46 units and the auxin concentration in B is 33 units then the auxin concentration is C is units1.Do you think Bangladesh is capable of doing transgenic crop research? Write your thoughts in details. 2. Write your opinion with examples on the following statement, "Plant regeneration is the response to the plant growth hormone"
- What is a homeobox gene? Give at least two examples of plant tissues such genes might govern in a species such as A. thaliana.Explain the sequence of events in a flowering plant that begins with formation of a pollen tube and culminates with the formation of a diploid zygote and the 3n cell that will give rise to endosperm in a seed.2. Define the following terms: (a) papilla (b) abscission layer. How are each of thse structures involved in plant defense. 3. What changes occur in a plant cell undergoing the hypersensitive response?