TOPIC 17 DAY 2 TRANSPIRATION

Plant tissues come in several forms: vascular, epidermal, ground, and meristematic. Each type of tissue consists of different types of cells, has different functions, and is located in different places. In the human body, the blood stream transports water and nutrients throughout the body.

Which type of tissue serves a similar function in plants?

• Dermal tissue

• Ground tissue

• Vascular tissue

• Meristematic tissue

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If the xylem in a young tree is damaged, which process is FIRST affected?

• performing photosynthesis

• transporting sugar to the roots

• transporting water to the leaves

• water entering from the soil

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The stomata on a saguaro cactus must open to let in carbon dioxide from the atmosphere. When each stoma opens, however, water can escape from the plant.

How does the saguaro minimize the loss of water when stomata open?

• Guard cells open and close the stomata rapidly during the day to let as little water as possible escape.

• Guard cells open the stomata only at night, when the air temperature is cooler and the humidity somewhat higher.

• Guard cells always keep the stomata open slightly, so that carbon dioxide can flow in but very little water can flow out.

• The saguaro has fewer stomata than any other plant, an adaptation that prevents water loss through transpiration.

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In plants, water can escape through the leaves by the process of transpiration. Which of the following structures are involved in transpiration?

• xylem, phloem, stomata

• phloem, root hairs, xylem

• root hairs, xylem, stomata

• stomata, phloem, root hairs

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According to this simplified water cycle, what is the function of the process of transpiration?

• releases water vapor from plants

• decreases the rate of the water cycle

• causes photosynthesis in plants

• speeds the evaporation of water

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