Summary of Key Points (Leaving Cert Biology): Quizzes
📚Quizzes
Practise the questions
13 questions from this quiz
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Practise the questions
13 questions from this quiz
How many pollen sacs does an anther contain?
How many pollen sacs does an anther contain?
Four
What type of cell division does the microspore mother cell undergo?
What type of cell division does the microspore mother cell undergo?
Meiosis
What are the two haploid nuclei produced in each pollen grain called?
What are the two haploid nuclei produced in each pollen grain called?
Generative and tube nuclei
How many haploid cells are produced when the megaspore mother cell divides?
How many haploid cells are produced when the megaspore mother cell divides?
Four
What happens to three of the four haploid cells in the ovule?
What happens to three of the four haploid cells in the ovule?
They degenerate
How many haploid nuclei does the embryo sac produce after three mitotic divisions?
How many haploid nuclei does the embryo sac produce after three mitotic divisions?
Eight
What is pollination?
What is pollination?
Transfer of pollen to stigma
What is fertilisation?
What is fertilisation?
Union of gametes to form zygote
What does the tube nucleus control?
What does the tube nucleus control?
Pollen tube growth
In double fertilisation, what does the 1st sperm nucleus and egg nucleus form?
In double fertilisation, what does the 1st sperm nucleus and egg nucleus form?
Zygote (2n)
What is formed when 2nd sperm nucleus fuses with 2 polar nuclei?
What is formed when 2nd sperm nucleus fuses with 2 polar nuclei?
Triploid endosperm
Why is water necessary for seed germination?
Why is water necessary for seed germination?
For enzyme reactions
What happens to dry mass during germination?
What happens to dry mass during germination?
Falls then rises when photosynthesis begins