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प्रश्न
Bisexual : Hibiscus : : Unisexual : ___________
उत्तर
Bisexual : Hibiscus : : Unisexual : Papaya
APPEARS IN
संबंधित प्रश्न
Answer the following question.
What is pollination? Explain the different types of pollination.
Mention the changes a flower undergoes after fertilisation.
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
Explain the terms 'self pollination'
In tobacco plant, the male gametes have 24 chromosomes.
What is the number of chromosomes in the female gamete?
What is meant by 'unisexual flowers' and 'bisexual flowers'? Give two examples of each.
What is pollination? How does pollination occur?
What changes take place in the flower after fertilisation which lead to the formation of seeds and fruit?
The correct sequence of reproductive stages occurring in flowering plants is ______
When an insect sits on the flower of a plant then some 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.
(a) 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?
(b) What is the name of tube B?
(c) What is C which moves down through the tube B?
(d) Name D and E.
(e) What is F?
Fill in the blanks:
A carpel consists of ________ , ________ and ________.
State whether the following statement is true (T) or false (F):
Stamens make egg cells.
Mention the function of Flower.
Draw a labelled diagram of a bisexual flower.
In the figure, the parts marked A, B and C are sequentially:
(A) Plumule, Radicle and Cotyledon
(B) Radicle, Plumule and Cotyledon
(C) Plumule, Cotyledon and Radicle
(D) Radicle, Cotyledon and Plumule
Distinguish between unisexual and bisexual flowers giving one example of each. Draw a diagram showing process of germination of pollen grains on stigma and label the following parts:
(a) Female germ cell
(b) Male germ cell
(c) Ovary
Draw a diagram of the longitudinal section of a flower and label on it sepal, petal, ovary and stigma.
Describe an activity to demonstrate phototropism.
List any two differences between pollination and fertilisation.
Which of the following is not an unisexual flower?
a) Coconut
b) Papaya
c) Gulmohor
d) Maize
Answer the following question.
How does suitable pollination lead to fertilization?
What is cleistogamy? Write one advantage and one disadvantage of it, to the plant.
Pollen tube reaches the embryo sac via style.
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.
Which of the following are the chemical components of the wall of pollen tube?
How many middle layers are generally present in the wall of the anther lobes?
Which type of development is observed in male gametophytes of plants?
Identify the female gametophyte in angiosperms.
Flowers showing ornithophily show few characteristic like ______.
The process of release of eggs from the ovary is called ______
Variations occur as a result of ______
Which among the following statements are true for unisexual flowers?
- They possess both stamen and pistil
- They possess either stamen or pistil
- They exhibit cross pollination
- Unisexual flowers possessing only stamens cannot produce fruits
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?
Give any two examples of agents of pollination.
What is the function of calyx?
Triple fusion involves ______.
State the post-fertilisation changes that lead to fruit formation in plants.
