Предмет: Биология, автор: fialkadasha1

Прикладом мутуалізму є взаємозв`язки організмів: а) ставковик і печінковий сисун
б) актинія і рак-самітник
в) лев і гепард
г) сапсан і горобець

Ответы

Автор ответа: valerikov07

Ответ:

б) актинія і рак-самітник

Объяснение:

Класичним прикладом є молюск раків-самітників з актиніями. Рак перебуває під захистом жалких клітин актинії, тоді як його активність допомагає актинії добувати їжу. У цих взаємовідносинах можна виділити декілька етапів посилення зв'язку між партнерами.

fialkadasha1: Дуже дякую

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Have you ever been happy at school?
Some children can say that they have been happy at school. Some can't. Some children like the school the first day they come into the building. They see friends in their teachers. Some children like big schools where they can hide from others. For some children it is extremely important to get a very good education as they are going to enter the university. The most valuable quality in teachers and schools for them is knowledge and possibility to teach. Others think that relationship between children are more important. Altogether there are many factors which can make you happy or unhappy at school.Our school has everything for the pupils. In our computer lab there are ten computers, and we can use them after lessons to prepare our papers and reports.The walls are blue in my school. I have read that this colour helps pupils concentrate. In every classroom you can see flowers and posters on the walls, nice curtains on the windows. All this makes our school beautiful.My favourite school subjects are Russian and Russian Literature because I like the teachers, but also because it helpsme understand our history. It is interestingto learn about our language, and how it changed. I also want to write correctly. ButI'm not very good at physics and chemistry. It is difficult for me to memorizeand use formulas.Our teachers offer us many interesting activities: we stage plays in ourschool theatre, visit theatres together, make posters and wall newspapers. We also often go on excursions to many interesting places with our teacher of history, who is our form master. My friendsand I have been to Novgorod, Ladoga, and Pushkinskye Gory this year.My friends study at the same school. We go to school together. It is fun! Our class is very friendly. I usually invite allclassmates to my birthday parties. We help each other with difficult subjects and borrow books from each other. During the breaks we speak about everything in the world and share all our secrets. It is great to have so many friends.That is why I can say that I have been happy at school.
Questions:1. What kind of school did you go to?
2. What equipment does your school have?
3. How many floors are there in your school?
4. What are your favourite subjects? Why?
5. What subjects do you dislike? Why?
6. How many lessons did you usually have?
7. Were your classmates friendly?
8. Did you like your school?
9. Did you change schools?
10. Was there a strict discipline in your school?
11. What exams did you take at school?