Advertisements
Advertisements
Question
What is seed? What are the parts of a seed? Explain with the help of a labelled diagram.
Advertisements
Solution
Seed is the reproductive unit of a plant. The various parts of a seed are plumule, radicle and cotyledon.
APPEARS IN
RELATED QUESTIONS
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
Mention the changes a flower undergoes after fertilisation.
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
How does the process of fertilisation take place in flowers?
Fill in the following blank with suitable word :
Pollen grains contain ............ gametes of a plant.
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 name of the structure in the flower in which the male gamete is formed is...........
In tobacco plant, the male gametes have 24 chromosomes.
What is the number of chromosomes in the zygote?
Describe the process of fertilisation in a flower with the help of labelled diagrams.
Put a tick mark (✓) against the correct alternative in the following statement
Pollen is produced in the:
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
“Cell division is a type of reproduction in unicellular organism.” Justify.
Draw a diagram of the longitudinal section of a flower and label on it sepal, petal, ovary and stigma.
Find the odd one out:
What does germination mean?
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 type of development is observed in male gametophytes of plants?
Pollen grains are produced by ______
Type of sexual reproduction is ______.
State the post-fertilisation changes that lead to fruit formation in plants.
