Advertisements
Advertisements
Questions
Name the male part of the flower.
What is the name of the male part of a flower?
Advertisements
Solution
The stamen is the male part of the flower.
APPEARS IN
RELATED QUESTIONS
What is pollination?
Name the parts A, B and C shown in the following diagram and state one function of each.
You are asked by your teacher to study the different parts of an embryo of a gram seed. Given below are the steps to be followed for the experiment:
I. Soak the gram seeds in plain water and keep them overnight.
II. Cut open a soaked seed and observe its different parts.
III. Take some dry gram seeds in a petri dish.
IV. Drain the excess water.
V. Cover the soaked seeds with a wet cotton cloth and leave them for a day.
The correct sequence of these steps is :
(A) III, I, V, IV, II
(B) III, I, II, IV, V
(C) III, IV, V, I, II
(D) III, I, IV, V, II
How is the process of pollination different from fertilization?
The fusion of male and female gametes is termed as ______.
Explain what you understand by sexual reproduction.
Sketch the reproductive parts of a flower.
How does the process of fertilisation take place in flowers?
State the name of the functional unit concerned with sexual reproduction.
What is the function of a flower?
What are the reproductive organs in a flower?
Fill in the following blank with suitable word :
The ovary of a flower becomes ....... after fertilisation.
Fill in the following blank with suitable word :
The female organ of reproduction in the flower is the...........
Fill in the following blank with suitable word :
The term used to refer to the transfer of pollen from the stamen of one flower to the carpel of another flower of the same species is...........
Explain the term 'fertilisation'.
What type of plants reproduce by sexual reproduction method?
Name the part of a seed which grows into shoot.
In tobacco plant, the male gametes have 24 chromosomes.
What is the number of chromosomes in the female gamete?
Which of the following statements are true for flowers?
(i) Flowers are always bisexual.
(ii) They contain sexual reproductive organs.
(iii) They are produced in all groups of plants.
(iv) after fertilization they give rise to fruits.
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?
| When an insect sits on the flower of a plant then somene particles A present in the top of little stalks in the flower attach to its body hair. When this insect now sits on the flower of another similar plant, then particles A attached to the hair of insect are put on the top of a flask-shaped organ at the centre of flower. The particle A grows a long tube B from the top of flask-shaped organ through which C moves down and reaches the bottom part of flask-shaped organ. Here C fuses with the nucleus of D contained in structure E. The fusion of C and D forms a new cell F which grows and develops into a seed of the plant. |
- What are particles A? What is the process of transferring A from one flower to another flower of similar plant by the insect known as?
- What is the name of tube B?
- What is C which moves down through the tube B?
- Name D and E.
- What is F?
In what ways is fertilisation in a plant different from fertilisation in a human?
What is a flower ? Draw a neat labelled diagram showing the L.S. of a typical flower.
Multiple choice question. Tick (✓) the correct choice:
Unisexual flowers are found in
- mulberry
- mustard
- pea
- sunflower
Fill in the blanks:
A stamen consists of ______ and ________.
Find the odd-one out, giving reason:
Anther, pollen grain, ovule male gamete
Draw a labelled diagram of a bisexual flower.
Draw a diagram of the longitudinal section of a flower exhibiting germination of pollen on stigma and label (i) ovary, (ii) male germ-cell, (iii) female germ-cell and (iv) ovule on it.
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
Draw a diagram of a pistil showing pollen tube growth into the ovule and label the following:
Pollen grain, male gamete, female gamete, ovary.
Describe an activity to demonstrate phototropism.
Identify the odd. Stigma, Style, Pollen, Ovary.
Find an odd one out.
Bisexual : Hibiscus : : Unisexual : ___________
Accessory whorls : Calyx and corolla : : essential whorls : ______________
Pollen tube reaches the embryo sac via style.
Give scientific reason.
Flower is a structural unit of sexual reproduction in plants.
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?
Antipodal cells are present towards the ______ in an anatropous ovule.
Generally, in a pollen tube, which of the following moves to the tip of the tube?
Identify the female gametophyte in angiosperms.
Gloriosa superba exhibits ______.
Flowers showing ornithophily show few characteristic like ______.
The process of release of eggs from the ovary is called ______
In human beings, fertilization occurs in the ______
State the number of sets of chromosomes present in a zygote.
Sketch and label the essential and accessory whorls of flower.
What is the structural unit of sexual reproduction in plant?
The figure below shows the concept of double fertilization. Complete the flow chart showing the progress at each step:
- Assertion: Primary endosperm nucleus is diploid.
- Reason: It is the product of double fertilisation.
