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1、新课标人教版课件系列,高中英语 选修(模块）9-4.4,How much do you know about plants?,Warming up,Do you know that? 1. some plants do not have flowers? For example pine trees, cypress trees, ferns, mushrooms. With these plants, the seeds are not contained inside a fruit. Flowering plants have seeds that are contained insid
2、e fruit.,2. some plants have roots that live in the air? For example, mangrove trees live in wet conditions and have roots that grow up from the mud into the air to absorb oxygen (See Picture A, the mangrove tree). Other plants that have aerial roots are plants such as some ferns, some orchids and c
3、limbers in rainforests that use their roots to attach themselves to other plants. Their roots not only attach the plant to the tree but also absorb water from the air (See Picture D, the birds nest fern).,3. some plants eat meat? They get their food from animals by trapping insects that land on them
4、, killing them and then digesting their bodies with chemicals. Picture B shows an insect-eating plant called a Venus flytrap. When the hairs on the leaves are touched by an insect, the two parts of the leaf snap together and trap the victim.,4. some plants need animals to pollinate them? They have d
5、eveloped flowers with different characteristics to attract particular animal pollinators such as bees, flies, butterflies, birds, bats, beetles, and moths. Plants that do not have flowers need other ways of making sure that they are pollinated, for example, corn, grasses and many trees depend on the
6、 wind or water to transport pollen from one plant to another.,5. some plants grow on other plants? They use their roots to attach themselves to another plant. Some use their roots to absorb water from the air (See Picture D). Plants like this are different from parasitic plants that actually live on
7、 another plant and get their food from the host.,6. plants are adapted to live in specific environments? For example, plants that live in the tropics are adapted to living in a hot wet climate. Picture C shows palms that live in tropical climates. Plants that are used to cold conditions cannot neces
8、sarily live in hot conditions.,7. people buy plants that come from other countries for their gardens? People tend not to think about where the plants in their pots or gardens come from. In fact, many come from other countries, for example, tulips from southern Europe and Turkey, carnations from sout
9、hern Europe and Greece, evening primroses from North America, daffodils from the Mediterranean area, Crane flower from South Africa, daisies and violets from Europe, etc.,8. a new plant does not always grow from a seed? New plants often grow from underground roots or stems, for example, the bamboo m
10、akes new plants by sending up new shoots from underground stems. Strawberry plants and many grasses and some ferns send out stems that run along the top of the ground and new plants grow along these stems. Other plants, like the daffodil, make new plants from bulbs. New plants can also grow from ste
11、ms that have been cut from a plant.,some special plants,Do you have a courtyard or some pot plants on your balcony? Do you know where these plants come from? Are they Chinese plants or do they come from another country?,Pre-reading,When you last visited a public garden, did you look at the individua
12、l plants there? Were there any plants from other countries?,How do you think plants have traveled from one country to another?,Joseph Banks 1768-1771,Dr Nathaniel Ward,Dr. Nathaniel Bagshaw Ward (1791-1868) For an individual who influenced the modern world so greatly, surprisingly little is know abo
13、ut Dr. Nathaniel Ward. Born in London, Ward developed an early interest in the natural world, despite his urban surroundings. It is believed he was sent to Jamaica when he was thirteen, where he may have developed his interest in tropical foliage. He practised as a physician in the East End of Londo
14、n (some records suggest that he was a surgeon) and pursued his interests in botany and entomology in his spare time, and when on vacation in Cobham, Kent.,The Wardian case,Robert Fortune (1812-1880) represented the Horticultural Society of London (now the Royal Horticultural Society) as a collector
15、in China shortly after the Treaty of Nanjing had brought the Opium War to a close. Through his use of the Wardian case, Fortune was able to introduce many of the best-known Chinese garden plants into cultivation in Europe and North America.,Pre Paul Guillaume Farges (1844 - 1912),Pre Paul Guillaume
16、Farges (1844 - 1912) French missionary and naturalist. Born at Monclar-de-Quercy, Tarn-et-Garonne. He was sent to China in 1867 and remained stationed in north-east Sichuan until 1903. Although he had always nurtured an interest in the local flora and fauna, it was not until 1892 that he started to collect herbarium specimens in earnest. During the eleven years before he moved south to Chongqing, he collected and preserved over 4,000 specimens.,Dove Tree,Ernest Henry Wilson
