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- When stomata open, what occurs?______ Water vapor is lost to the external environment, increasing the rate of transpiration Water vapor is lost to the external environment, decreasing the rate of transpiration Water vapor enters the spaces in the mesophyll increasing the rate of transpiration Water vapor enters the spaces in the mesophyll decreasing the rate of transpiration.1.Explain the underlying mechanism in the opening and closing of a stomate. 2.How does oxygen get to the different parts of the plant? 3.Explain countercurrent flow. How does it help make the fish gill the most efficient respiratory organ? 4.In what form does most of the carbon dioxide travel in the blood? How and where is thismolecule produced?3.Explain the transpirational pull mechanism that occurs inside the plant cell.
- 1. Compare and contrast Apoplastic and Symplastic pathways of water in plants. 2. What causes the opening and closing of guard cells of stomata during transpiration? 3. Differentiate sources and sinks 4. Define transpiration and give some of its significance 5. How do root hairs absorb water?1. Why is the cell wall important in plant design?2. In terms of structure and composition, differentiate between primary and secondary cell walls.3. Tabulate the differences between typical dicot and typical monocot stems with respect to arrangement of the three tissue systems.1. Explain how leaf surface area is correlated to plant transpiration and photosynthesis. Discuss the impact or consequences of having a small or large leaf surface area, to the overall photosynthetic rate and transpiration rate of a particular plant. 2. Distinguish compound leaves from simple leaves and provide illustrations for better differentiation/ comparison of the two. Please make sure that your illustrations are properly labelled. 3. Discuss the major functions of plant root and differentiate the taproot and fibrous root system. Afterwards, briefly explain the advantage/s and disadvantages of the two root systems in terms of resource (water and nutrients) acquisition. You may include some illustrations/ diagrams to support your discussion.
- 1. What is the specific epithet of sequoia sempervirens (d.don) endl 2. Xylem is mainly responsible in transporting from roots to shoots and vice versa. photosynthetic products from sources to sinks while phloem is responsible in long-distance transport of water and minerals. (True or False?) 3. Efficient movement water and minerals is possible because mature tracheids and vessel elements have no cytoplasm, and sieve-tube elements have few organelles in their cytoplasm (True or False?)4. Define transpiration and give some of its significance 5. How do root hairs absorb water? 6. A plant hormone was first discovered in Japan when rice plants were suffering from Bakanae disease caused by Gibberella fujikoroi. Based on this information answer the following questions: a. Identify the hormone involved in this process. b. Which property of this hormone causes the disease? 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.1. The distribution of water through the symplast occurs in the cell walls and xylem elements. C. Agree, because symplasts are near cell walls and xylem elements. B. Disagree, because water can pass anywhere. D. Disagree, because cell walls and xylem elements are conduits of the apoplast. A. Agree, because symplast are non-living conduits
- 1. Where does the SOLID mass of plant come from? 2. Describe why it is fair to say that : “Plants do not grow from the soil, they are made of air.”3. What are the 3 zones and 3 layers of the shoot apical meristem?1. What is the pathway of carbon dioxide fixation 2. What are the adaptions and resistance of plant to high temperatures 3. What are the adaptions of plant growth in cold regions