used to stain structures containing starch which is indicated by the color change from brown to reddish-brown or blue-black. The stem‚ leaf‚ and root cross sections all contain starch. The roots stained the darkest meaning starch is stored more in them. Sudan IV dye stains lipids into pink to red color. All cells in a plant tissue contain lipids so the stem‚ leaf‚ and root cross sections are expected to stain red. However‚ only the stem cross section was able to produce a positive result.
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Title: Transpiration Aim: To study the significance of the pattern of stomatal distribution in Coleus and Lucky bamboo leaf Theory: Transpiration is the loss of water vapour from the surface of the plants due to evaporation. Transpiration can help the uptake of water in the xylem due to transpiration pull. During transpiration‚ mesophyll cells lose water continuously to the air space. This decreases the water potential of the mesophyll cells. Water is then drawn from their neighbouring cells
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down towards the roots of the plant. Match the adaptations of the marram grass leaves with their function Waxy Cuticle Reduce water loss through transpiration Stomata sunk in pits Trap a layer of moist air close to the leaf surface Leaf
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Plants have two separate transport systems. A network of xylem vessels transports water and mineral ions from the roots to all other parts of the plant. Phloem tubes transport food made in the leaves to all other parts of the plant. Neither of these systems has a pump‚ this is because they are not as active as animals and do not need such rapid supplies of food. Neither xylem nor phloem transports oxygen as oxygen gets to a plants cell by diffusion. Both stems and roots contain xylem vessels and
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develops many side branches that are not productive. There are new leaves growing in branches. The size of the leaves increases lengthwise and breadthwise. Leaves are oval in shape‚ deeply and palmately 4-7 lobed‚ serrated margins‚ cordate at base‚ leaf tip acute or obtuse. 1.4.3 Flowering stage: In flowering stage yellow dioecious flowers usually appear in 5 to 6 weeks. The male and female flowers are borne separately on the same plant and male flowers normally exceed the females by about 25:1. -
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were splitting and the spindle fibres were very noticeable. Conclusion: Answer question 3 on page 49 3. The white fish embryo and alliums root slides were used to study mitosis instead of human bone and plant leaf because it was easier to obtain. This does not apply to the plant leafs but I’m guessing that the white fish embryo and alliums root slides have a faster mitosis rate than the plant
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cells near source tissues. Water follows by osmosis‚ creating a pressure gradient that favours the movement of water and sucrose sinks Stomata are open during the day so that gas exchange can occur between the atmosphere and the cells inside the leaf. Water loss is a side effect of photosynthesis The evaporation can actually be beneficial under some conditions because it cools the plant Water potential and water movement (37.1) Loss of water via evaporation from the aerial parts of a plant
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TRANSPIRATION: Investigation 11 Learning Objectives: To investigate the relationship among leaf surface area‚ number of stomata‚ and the rate of transpiration To design and conduct an experiment to explore other factors‚ including different environmental variables‚ on the rate of transpiration To investigate the relationship between the structure of vascular tissues (xylem and phloem) and their functions in transporting water and nutrients in plants Before doing this laboratory you should understand:
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PRACTICAL 6 Seed Plants (Gymnosperms and Angiosperms) OBJECTIVES: 1. To describe the features of seed plant life cycle and the concept of the dominant generation. 2. To describe the life histories and related reproductive structures of gymnosperms and angiosperms. 3. To summarize the features that distinguish gymnosperms and angiosperms. 4. To discuss the advantages of seed plants to dominate land and their evolutionary adaptations on land. EXPERIMENT 1: Gymnosperms INTRODUCTION: Gymnosperms
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The natural world is extremely varied‚ so an easier way biologists and people can better understand the Earth’s environment and its ecosystems is to categorize it into groups called biomes. Biomes are arranged by specific environmental conditions (i.e. rainfall‚ temperature‚ and humidity) and house specific types of vegetation or factors that allow organisms adapt to these environments. Cataloguing organisms that share similar adaptations makes it easier to study all the environments found on Earth
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