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प्रश्न
Triple fusion involves ______.
पर्याय
Fusion of male gamete with female gamete
Fusion of tube nucleus with generative nucleus
Fusion of two polar nuclei
Fusion of second male gamete with two polar nuclei
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उत्तर
Triple fusion involves fusion of second male gamete with two polar nuclei.
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संबंधित प्रश्न
A student was asked to observe and identify the various parts of an embryo of a red kidney bean seed. He identified the parts and listed them as under:
I. Tegmen
II. Testa
III. Cotyledon
IV. Radicle
V. Plumule
The correctly identified parts among these are
(A) I, II and III
(B) II, III and IV
(C) III, IV and V
(D) I, III, IV and V
What is pollination?
A student has to perform the experiment "To identify the different parts of an embryo of a dicot seed." Select from the following an appropriate group of seeds:
(a) Pea, gram, wheat
(b) Red kidney bean, maize, gram
(c) Maize, wheat, red kidney bean
(d) Red kidney bean, pea, gram
Name the male part of the flower.
What is the name of female organ of a flower (other than carpel)?
Fill in the following blank with suitable word :
Pollen grains contain ............ gametes of a plant.
Fill in the following blank with suitable word :
Flowering plants reproduce by ...........method of reproduction.
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...........
How is the process of pollination different from fertilization?
One of the following occurs in the reproductive system of flowering plants as well as that of humans. This is :
(a) vas deferens
(b) anther
(c) ovary
(d) style
In the figure given alongside, the parts marked A, B and C are sequentially :
(a) cotyledon, plumule and radicle
(b) plumule, radicle and cotyledon
(c) plumule, cotyledon and radicle
(d) radicle, cotyledon and plumule
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 ________.
Fill in the blank:
Seeds are formed from________.
Mention the function of Stigma.
Identify A, B, C and D in the given diagram and write their names.
(a) Identify A, B and C in the given diagram and write their functions.
(b) Mention the role of gamete and zygote in sexually reproducing organisms.
What is phototropism?
Describe an activity to demonstrate phototropism.
Explain sexual reproduction in plants.
Prepare a slogan for campaign against female foeticide.
Find the odd one out:
Distinguish between self-pollination and cross-pollination.
The essential parts of a flower are ______.
How many middle layers are generally present in the wall of the anther lobes?
Identify the female gametophyte in angiosperms.
Conidia are formed endogenously while zoospores are formed endogenously.
The process of release of eggs from the ovary is called ______
Length of pollen tube depends on the distance between ______
Draw the diagram of a flower and label the four whorls. Write the names of gamete producing organs in the flower.
The ovaries of different flowers may contain ______.
In a plant flower the female whorl is ______.
What is the structural unit of sexual reproduction in plant?
What are the agents for pollination?
The figure below shows the concept of double fertilization. Complete the flow chart showing the progress at each step:
The pollen tube usually enters the embryo sac ______.
Consider the following three flowers namely X, Y and Z. Which flower(s) would develop into a fruit?
| Flower X | Flower Y | Flower Z |
 |
 |
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