Предмет: Биология, автор: Mari15

Охарактеризуйте основные различия фауны и флоры на Земле в мезозойскую эру?

Ответы

Автор ответа: ksuha31
0

В животном мире мезозойской эры наибольшего распространения достигают насекомые и пресмыкающиеся.Вымирают земноводные и древовидные папоротникообразные.В триасе некоторые пресмыкающиеся вторично возвращаются в воду,на мелководье обитают плезиозавры,далеко от берега охотятся ихтиозавры.Появились: растительноядные и хищные динозавры небольших размеров-до 6метров;первые яйцекладущие млекопитающие,они же стали поддерживать постоянную температуту тела;первоптицы-археоптерикс,летающие ящеры-птерозавры,плацентарные и сумчатые млекопитающие,а так же произошел расцвет и господство голосеменных.Затем в Меловом периоде появляются покрытосеменные,так же и развитие цветка и плода(крупный араморфоз!),которое связанно с широким распространением насекомых.Сохраняется господство пресмыкающихся.птицы еще сохраняют зубы.Похолодание и засушливы климат верхнего мела приводит к вымиранию влгаолюбивых растений,растительноядных,а затем хищных динозавров.

Похожие вопросы
Предмет: Английский язык, автор: Аноним
Дам 40 баллов кто решит этот тест. A. Fill in the missing word/ phrase. There are some answers you do not need to use.
Showed up, stubborn, acquaintances, niece, reliable, slim, got over, colleagues, shrugged, tapping,
1. Kate is so _____________ ! She never listens to anyone, and does whatever she wants.
2. Ann is not going camping this weekend; she still hasn’t ______________ her cold.
3. They’re not really friends, we’re just ______________.
4. When we complained to the waiter about the noisy people at the next table, he just __________ his shoulders.
5. When James told his _____________ that he was leaving the company, they decided to buy him a going- away present.
6. Jane is a pretty girl with blue eyes and a(n) ______________ build.

B . Fill in the missing word. There are some answers you do not need to use.
Hug, opportunity, fond, energetic, dull, keen, host, avoid, bright, blush
7. The play I went to see last week was so _________ that I almost fell asleep at the cinema.
8. Sam is a very cheerful person who always looks on the ___________ side of life.
9. Dolly is very _____________. She works very hard and likes participating in a lot of activities.
10. When I told Ben the good news, he gave me a big __________ and a kiss on the cheek.

C Underline the correct item.
11. Do you know where Mark is? I have waited / have been waiting for him for over an hour and I’m starting to lose my patience.
12. Watch where you’re going! You are falling / are going to fall into that hole.
13. Lyn is always interrupting/has always interrupted me whenever I tell a story. It’s so annoying!
14. There’s someone at the door. I go/will go and see who it is.
15. The film is starting/ starts at 8:00. Do you want to go to dinner before that?
16. I promise I am helping /will help you with your homework as soon as I can.
17. Have you met/ Have you been meeting our new neighbours yet? They seem really nice.
18. We are going / will go to the cinema tomorrow night. Why don’t you join us?

D. Put the adjectives in brackets into the correct form.

19. My younger brother is ____________________ (sociable) person in our family.
20. Don’t you think that Adam needs to be a bit _____________ (sensitive) to other people’s feelings?
21. Mrs. Brown is _______ (kind) teacher I have ever had.
22. Ben was very rude to Jane. I think that ________________ (little) he could do is apologize to her.
23. According to an English saying, the ___________ (old) we grow, the wiser we become.

E Choose the correct response.
24. Can I offer you something? ________ A So am I.
25. Excuse me! ________ B Take care.
26. Talk to you later. ________ C Yes, can I help you?
27. I’m glad you came. ________ D Fine, thanks.
28. How’s it going? ________ E No thanks, I’m fine.