Предмет: Биология, автор: abdulla0010595

растительная клетка

Ответы

Автор ответа: Tolordava1969
0
Расти́тельные кле́тки — эукариотические клетки, однако несколькими своими свойствами они отличаются от клеток остальных эукариот. К их отличительным чертам относят:

Крупная центральная вакуоль, пространство, заполненное клеточным соком и ограниченное мембраной — тонопластом[1][2]. Вакуоль играет ключевую роль в поддержании клеточного тургора, контролирует перемещение молекул из цитозоля в выделения клетки, хранит полезные вещества и расщепляет отслужившие старые белки и органеллы.
Есть клеточная стенка, состоящая главным образом из целлюлозы, а также гемицеллюлозы, пектина и во многих случаях лигнина. Она образуется протопластом поверх клеточной мембраны. Она отлична от клеточной стенки грибов, состоящей из хитина, и бактерий, построенной из пептидогликана (муреина).
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Прочтите текст.
The Smuggler and the Customs Officer.

The customs officer had seen the same man coming into the country every day for the past month. He knew that this man must be smuggling something into the country, but he didn’t know what it was. The man was always very polite. He always took off his hat and said “Good afternoon”, to the customs officer. The customs officer always asked him to open his bag, but the customs officer couldn’t find out what the man was smuggling into the country. He couldn’t find any whisky or perfume or cigarettes or anything. When the customs officer had looked through the man’s bag and couldn’t find anything, the man always took off his hat and said, “Thank you. Goodbye!” He was very polite, but the customs officer was sure the man was a smuggler.

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Ответьте на вопросы по тексту, выбирая правильный вариант.
1. How often had the man been smuggling through customs?

a) he had been smuggling for six weeks.

b) he had been smuggling for a day.

c) he had been smuggling for a year.

d) he had been smuggling for a month

2. How often did the man come into the country?

a) he came in every year.

b) he came in every day.

c) he came in every week.

d) he came in every month.

3. What kind of luggage did the man have?

a) he had a briefcase.

b) he had a suitcase.

c) he had a package.

d) he had a travelling bag.

4. How do you know that the man was polite?

a) he always spoke to the customs officer.

b) he always opened his luggage when the customs officer asked.

c) he always gave the customs officer cigarettes.

d) he always took off his hat and said, “Good afternoon”.

5. Why did the customs officer leave his job?

a) he left because he wasn’t polite.

b) he left because he was unhappy.

c) he left because he wanted to be a smuggler.

d) he left because he was too old.

6. What did the new customs officer find?

a) he found a lot of cigarettes.

b) he didn’t look in the luggage.

c) he found a lot of whisky.

d) he didn’t find anything.

7. What was the man really smuggling?

a) he was smuggling perfume.

b) he was smuggling whisky.

c) he was smuggling hats.

d) he was smuggling cigarettes.
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