Question

The Green Machine III Understanding Roots, Stems, and Leaves 13 To find water, a plant hus to position its roots with just as much precision as it arranges its leares David Attenborg (1926-present) Just wondering... Answer the following questions prior to coming to lab. 1 Do some plants communicate when attacked by insects? OBJECTIVES Ar the completion of this chapter the student will be able to: 1 Compare and contrast herbaceous and woody plants. 2 Describe the basic function of roots, stems, and leaves. 3 Describe the basic anatomy of roots, stems, and leaves 4 Identify the basic microscopic anatomy of selected roots, stems, and leaves 5 Describe specialized roots, woody stems, and leaves. 6 Describe basic shapes of leaves and their margins. 7 Identify basic shapes of leaves and their margins. 2 What is the significance of cinchona bark in medicine and history? 3 What kind of tissue allows many water plants to float? 4 is the only function of spines on cacti defense? 5 Why do carnivorous plants 'eat' insects? 279

Answer 1

1. Answer: Yes, palnts communicate when they are attacked by the insects. If the insects attack the plants, these plants release volatile organic compounds (VOCs). These VOCs on reaching other plants stimulate them to produce other type of VOCs which repels the insects.

2. Answer: Cinchona bark contains quinine which are used to treat malaria.

It is said that Cinchona had cured the wife of the count of chinchon, a Spanish viceroy in Lima.

3. Answer: The tissue which helps many aquatic plants to float is Aerenchyma Tissue, a kind of parenchyma tissue. This tissue has has wider spaces in which air is present and and thus keep the plant floating.

4. Answer: No, defense of the cactus plant is not the only role of spines in cactus but also prevents water loss from the plant.

​​​​​​5. Answer: ​​​​​​ Carnivorous plants grow in those soils which are nitrogen deficient. Thus, in order to fulfill their demand for the nitrogen these plants take the insects and from their proteins they take nitrogen