Предмет: Биология, автор: tlizo4ka

Продуктивность зрелых экосистем близка нулю. Чем это объясняется?

Ответы

Автор ответа: Jendosina5

Чем больше развита экосистема, то есть чем она ближе к своему зрелом состоянию, тем выше её продуктивность. Так лес, например, в своём зрелом состоянии даёт наибольший "урожай" травянистых, мха, листвы, грибов, ягод по сравнению с молодым лесом, и, следовательно, характеризуется наибольшей продуктивностью.

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It is sunny today. It is very hot. We are hot. We take a big towel, three cups, three plates, some milk, some meat, three apples and go to the lake.

The lake is big and the water in the lake is cold. We swim and play. Then we go out. Blackie does not go out. He is in the lake.

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"Eat the meat. I can fish here."

So Blackie is in the water. The water is cold. Pinky is not happy. She is sad. She looks at me and says:

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Blackie is fishing now. He is not looking at me. I walk into the water and dive. Now I am under the water. I swim to Blackie under the water. Now I can see his legs. I open my mouth and bite him.

"Help!" cries Blackie. "There is a monster in the water."

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"There is a monster in the lake!" he says to Pinky.

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Pinky looks at Blackie. She knows that monster but she says:

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"OK," says Blackie. He is afraid. He looks at Pinky and says:

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"Oh no!" cries Pinky. "He is in the water!"

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"Reddy, come out!" cry Pinky and Blackie. "There is a terrible monster in the water!" says Blackie.

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"It is long and it has got red ears and very sharp teeth!"

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Exercises
1 Answer the questions.

1. What's the weather like today?

2. Are the kittens hot?

3. What do they take?

4. Where do they go?

5. Is the water hot?

6. Who is the monster with red ears?

7. Who is the monster with a black tail?
3 True or false?

1. Blackie is sad.

2. Reddy bites Pinky.

3. Pinky is under the water.

4. There is a monster in the lake.

5. The lake is small.

6. Pinky is swimming in the lake.

7. Blackie is afraid of the monster.

4 Put the sentences in the correct order.

1. The kittens go the lake.

2. It is sunny today.

3. Reddy eats the meat.

4. Reddy bites Blackie.

5. Reddy dives into the water.

6. Blackie runs out of the water.

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