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प्रश्न
Draw a neat and labelled diagram.
Double fertilization in angiosperms
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उत्तर
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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
In the following diagram showing the structure of embryo of a dicot seed, what are the parts marked I, II and III sequentially?
A student while observing an embryo of a pea seed in the laboratory listed various parts of the embryo as given below:
Testa, Tegmen, Radicle, Plumule, Micropyle, Cotyledon.
On examining the list the teacher remarked that only three parts are correct. Select three correct parts from the above list:
(a) Testa, Radicle, Cotyleddon
(b) Tegmen, Radicle, Micropyle
(c) Cotyledon, Plumule, Testa
(d) Radicle, Cotyledon, Plumule
Name and differentiate between the two modes of pollination in flowering plants.
A student identified the various parts of an embryo of a gram seed and listed them as given below :
(I) Testa
(II) Plumule
(III) Radicle
(IV) Cotyledon
(V) Tegmen
Out of these the actual parts of the embryo are :
(A) I, II, III
(B) II, III, IV
(C) III, IV, V
(D) II, IV, V
Name the parts labelled as A, B, C and D in the diagram given below:
A flower may have either male or female reproductive parts. Such a flower is called ______.
Sketch the reproductive parts of a flower.
How does the process of fertilisation take place in flowers?
Where are a plant's sex organs located?
Name the part of a seed which grows into root.
Put a tick mark (✓) against the correct alternative in the following statement
Reproductive whorls of a flower are:
Fill in the blanks:
A carpel consists of ________ , ________ and ________.
Fill in the blanks:
A stamen consists of ______ and ________.
Find the odd-one out, giving reason:
Anther, pollen grain, ovule male gamete
Mention the function of Flower.
Mention the function of Stigma.
What are the male and female gametes in a flowering plant?
What is phototropism?
Fill in the blank by selecting suitable word:
Transfer of pollen grains from the anther to the stigma is known as______________.
Draw a diagram of the longitudinal section of a flower and label the following parts.
Find the odd one out:
Pollen grains are formed by _________ division in locules of anthers.
Bisexual : Hibiscus : : Unisexual : ___________
Where does the endothecium layer of anther lobes is present?
Which type of development is observed in male gametophytes of plants?
The 3-celled egg apparatus at the micropylar end comprises of ______
Identify the female gametophyte in angiosperms.
The process of release of eggs from the ovary is called ______
Variations occur as a result of ______
Which out of the following processes does not lead to the formation of clones.
Complete the table
| Carly x | ______ | ______ |
| ______ | petal | attract insects |
| Androecium | ______ | Male reproductive part |
| ______ | ______ | Female reproductive part. |
Draw the diagram of a flower and label the four whorls. Write the names of gamete producing organs in the flower.
Give any two examples of agents of pollination.
What is the structural unit of sexual reproduction in plant?
Sexual maturation of reproductive tissues and organs are necessary link for reproduction. Elucidate.
The pollen tube usually enters the embryo sac ______.
In male reproductive whorl of a flower the archesporial cells are formed by ______.
