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प्रश्न
Which of the following is not an unisexual flower?
a) Coconut
b) Papaya
c) Gulmohor
d) Maize
उत्तर
c) Gulmohor
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संबंधित प्रश्न
Name the parts A, B and C shown in the diagram and write their functions.
Answer the following question.
What is pollination? Explain the different types of pollination.
Write the names of those parts of a flower which serve the same function as the following do in the animals :
(i) testis,
(ii) sperm,
(iii) ovary,
(iv) egg
Explain what you understand by sexual reproduction.
Name the part made up of the stigma, style and ovary.
Name the swollen lower part of the carpel.
What is the function of a flower?
What is made in ovary of a flower?
Explain the term 'fertilisation'.
Name the part of a seed which grows into root.
Describe the process of fertilisation in a flower with the help of labelled diagrams.
Which of the following statements are true for sexual reproduction in flowering plants?
(i) it requires two types of gametes
(ii) fertilisation is a compulsory event
(iii) it always results in the formation of zygote
(iv) offsprings formed are clones
(a) (i) and (iv)
(b) (i), (ii) and (iv)
(c) (i), (ii) and (iii)
(d) (ii), (iii) and (iv)
The flask-shaped organ A at the centre of a flower is surrounded by a number of little stalks B having swollen tops which lie just inside the ring of petals.
(a) Name A. What are the various parts of A?
(b) Which part of A contains gametes?
(c) Name B. What is the swollen top of B known as?
(d) What does the swollen top of b contain?
(e) Out of A and B, which one is (i) male part, and (ii) female part of the flower?
Put a tick mark (✓) against the correct alternative in the following statement
Pollen is produced in the:
Multiple choice question. Tick (✓) the correct choice:
Unisexual flowers are found in
- mulberry
- mustard
- pea
- sunflower
Fill in the blanks:
A carpel consists of ________ , ________ and ________.
Mention the function of Stigma.
Write one main difference between asexual and sexual mode of reproduction. Which species is likely to have comparatively better chances of survival – the one reproducing asexually or the one reproducing sexually? Give reason to justify your answer.
A student is asked to study the different parts of an embryo of pea seeds. Given below are the essential steps for the experiment :
(I) Soak the pea seeds in plain water and keep them overnight.
(II) Cut open the soaked seed and observe its different parts.
(III) Take some pea seeds in a petri dish.
(IV) Drain the excess water. Cover the seeds with a wet cotton cloth and leave them as it is for a day.
The correct sequence of these steps is
(A) III, I, IV, II
(B) III, IV, I, II
(C) III, I, II, IV
(D) III, II, I, IV
Prepare a slogan for campaign against female foeticide.
Differentiate between self-pollination and cross-pollination.
Find the odd one out:
Pollen grains are formed by _________ division in locules of anthers.
Calyx : Sepals : : Corolla : ________________
Draw a neat and labelled diagram.
Double fertilization in angiosperms
The male reproductive part of a flower is ______.
Write the events involved in the sexual reproduction of a flowering plant.
a. Discuss the first event and write the types.
b. Mention the advantages and the disadvantages of that event.
Where does the endothecium layer of anther lobes is present?
The anther wall consists of four wall layers where ______
Sperm and egg nuclei fuse due to ______.
The seed that contains the future plant is called the ______
Is the chromosome number of zygote, embryonal cells and adult of a particular organism always constant? How is the constancy maintained in these three stages?
The ovaries of different flowers may contain
State the number of sets of chromosomes present in a zygote.
Double fertilization is essential for formation of ______.
Explain the post fertilization changes that occur in the ovary of a flower.
Given below is a diagram of a germinating seed. Label the parts that:
- gives rise to future shoot.
- gives rise to future root system.
- stores food.
