新倮标人教版课件系列 《高中英语》 选修(模块)944
新课标人教版课件系列 《高中英语》 选修(模块）9-4.4
Warming up How much do you know about plants?
How much do you know about plants?
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 inside fruit
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 inside 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 climbers 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)
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 climbers 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 bird's nest fern)
3. some plants eat meat They get their food from animals by trapping insects that land on them, 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
3. some plants eat meat? They get their food from animals by trapping insects that land on them, 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 developed 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 wind or water to transport pollen from one plant to another
4. some plants need animals to pollinate them? They have developed 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 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 another plant and get their food from the host
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 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 necessarily live in hot conditions
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 necessarily 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 southern Europe and Greece, evening primroses from North America, daffodils from the Mediterranean area. Crane flower from south Africa. daisies and violets from Europe etc
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 southern 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 makes new plants y 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 stems that have been cut from a plant
8. a new plant does not always grow from a seed? New plants often grow from underground roots or stems, for example, the bamboo makes 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 stems that have been cut from a plant