Предмет: Биология, автор: Аноним

Процес запліднення у голонасінних відбувається завдяки:

a) наявністю вологи

б)утворенню в мікроспорангіях пилкової трубки,

в)злиттю двох сперміїв з яйцеклітиною,

г)злиттю одного спермія з яйцеклітиною.

ДАЮ 25 БАЛЛОВ!!

Ответы

Автор ответа: borneo1

Ответ:

Процесс оплодотворения у голосеменных происходит благодаря: г)слиянию одного спермия с яйцеклеткой.

Объяснение:

a) наличию влаги - у голосеменных вода в оплодотворении не участвует

б)образованию в микроспорангиях пыльцевой трубки - в микроспорангиях пыльцевая трубка не образуется.

в)слиянию двух спермиев с яйцеклеткой, 2 спермия с яйцелекой не сливаются

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Другие предметы, автор: baramze

физика 9 класс
дано:
t=20c
g=10м/с^2
найти:
h-?
решение:

1 год назад

Предмет: Русский язык, автор: svetlovasveta1974

Помогите!
Какими членами предложения бывают имена существительные?Примеры.

1 год назад

Предмет: Английский язык, автор: alin0308345

Можете перевести задание и написать в каком времени глаголы
1. This man is a writer. He writes books. He has been writing books since he was a young man. He has already written eight books. 2. What have you been doing here since morning? 3. Lena is a very good girl. She always helps her mother about the house. Today she has been helping her mother since morning. They have already washed the floor and dusted the furniture. Now they are cooking dinner together. 4. He is running now. He has been running for ten minutes without any rest. 5. What are they doing now? — They are working in the reading room. They have been working there for three hours already. 6. Where is he now? — He is in the garden. He is playing volleyball with his friends. They have been playing since breakfast time. 7. I live in St. Petersburg. I have been living in St. Petersburg since 1990. 8. This is the factory where my father works. He has been working here for fifteen years. 9. Have you found your notebook? — No, I am still looking for it. I have been looking for it for two hours already, but have not found it yet. 10. You have been playing with a ball for three hours already. Go home and do your homework. 11. Wake up! You have been sleeping for ten hours already. 12. I have been waiting for a letter from my cousin for a month already, but have not received it yet. 13. She has already done her homework for two hours; but she has not done half of it yet. 14. I have been waiting for you since two o'clock. 15. What are you doing? – I am reading. I have been reading for two hours already. I have already read sixty pages. 16. It is difficult for me to speak about this opera as I have not heard it. 17. I have just received a letter from my granny, but I have not received any letters from my parents yet. 16. The weather is fine today. The sun has been shining ever since we got up. 19. Every day I wind up my watch at 10 o'clock in the evening. 20. Come along, Henry, what you are you doing now? I have been waiting for you for a long time. 21. Where are your gloves? — I have put them into my pocket. 22. I am staying with some American friends in Chicago. I have been staying with them for two weeks now. I am having a great time here, I am taking the opportunity to improve my English. I have already seen the towering skyscrapers of Chicago which are reflected in the rippling water of Lake Michigan. I have just taken a picture of Chicago's Sears Tower which rises 1,707 feet and provides a panoramic view from the skydeck. 23. I am going to give that cat some food. I am sure it is starving. — But Jane has already fed the cat. You needn't do it.

1 год назад

Предмет: Биология, автор: zippik2006

Помогите пожалуйста решить "Строение стебля"

7 лет назад

Предмет: Литература, автор: Smelch

Как называется человек , готовый пострадать за других ? Название встречается в «Преступление и наказание» , просто не помню !

7 лет назад