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  1. Read the text and find English equivalents to the Russian expressions:

1. Эндотермальные позвоночные, 2. плацентные, 3. ушные раковины, 4. развиваться в матке матери, 5. при помощи пуповины, 6. получать питание через, 7. молочные железы матери, 8. питательные вещества.

Mammals

Mammals are endothermic vertebrates. They are the only animals with fur or hair on their body, and ear flaps. Most mammals are placental mammals.

This means that their young develop inside the mother's uterus, nourished by an organ called the placenta. The umbilical cord connects the young to the placenta.

After birth, young mammals drink milk from their mother's mammary (milk-producing) glands until they are old enough to eat the adult's diet.

Milk is the ideal food for a young mammal: it contains all the nutrients that it needs for growth and development.

  1. Read the text and answer the questions.

Plants

Most plants are green because they contain the substance chlorophyll. They use it to trap light energy; this is used during photosynthesis to make food. Plants are usually anchored in a growing medium such as soil. Some, such as mosses and liverworts, are small and delicate. Others, such as the giant redwood trees are huge. Many plants, such as marigolds and sunflowers, are annuals, which mean that they live for just a year. Perennials can live for many years: some bristlecone pine trees, for example, are 5,000 years old.

1. Why are most plants green?

2. What for do they use chlorophyll?

3. What small and big plants do you know?

4. What are annuals and perennials?

  1. Read the text and get ready to ask 5 questions on it. Nonflowering Plants

Plants that do not use flowers for reproduction include conifers, ferns, mosses, and seaweeds (the last are not true plants). Conifers reproduce by means of cones. A male cone is usually smaller than а female cone, and both are usually carried on the same tree. Conifers have needlelike leaves, whose small surface area prevents the plant losing too much water. This helps conifers survive in the cold, dry places they often live in. Many conifers are evergreen - they do not shed their leaves in the fall.

  1. Read the text find English equivalents to the Russian words and expressions:

1. Лепестки, 2. опыление, 3. оплодотворение, 4. разбрасывание семян, 5. однодольные, 6. двудольные.

Flowering Plants

Using flowers to reproduce is so efficient that flowering plants are the most widespread of all ants. Flowers carry the reproductive organs within a ring of petals. After pollination and fertilization, the flowers produce seeds, which are enclosed and protected by fruits. These have clever ways of scattering their seeds. Some flowering plants, such as maize, make seeds in one part; they are monocots. Others, such as bean plants, make seeds in two parts; they are dicots.

  1. Read the text and match the sentences in a with the Russian equivalents in b Fungi

A

1. Although some fungi, such as yeasts, are one-celled and microscopic, most are multicellular (made up of many cells) and visible. 2. The cells are linked together in a thread called a hypha.3. Lots of hyphae make up a mycelium. 4. This is the main part of the fungus. 5. Most fungi are saprotrophs, ' which means that they feed on dead and decaying materials. 6. Some are animal or plant parasites.

7. Mushrooms and toadstools are probably the most well-known fungi. 8. Their hyphae grow under the soil and send up fruiting bodies (such as mushrooms), that produce spores. 9. Spores are one-celled reproductive structures that grow into new fungi.

B

a) Большое количество таких нитей составляет мицелий.

b) Хотя некоторые грибы, такие как дрожжи, одноклеточные и микроскопических размеров, большинство из них многоклеточные (состоят из многих клеток) и видны невооруженным глазом.

c) Их нити разрастаются под слоем почвы, от них на поверхность выходят плодоносные тела (такие как съедобные грибы),

d) Большинство грибов сапротрофы, т.е. питаются вымершими или гниющими материалами.

e) Споры - это одноклеточные воспроизводящие структуры, которые вырастают в новые грибы.

f) Клетки соединены вместе в виде нитей.

g) Некоторые из них паразитируют на животных или растениях.

h) Это основная часть гриба.

i) Съедобные грибы и грибы-поганки, вероятно, известны лучше всех остальных.

UNIT 4