Advertisements
Advertisements
प्रश्न
Describe an activity to demonstrate phototropism.
Advertisements
उत्तर
To demonstrate phototropism in plants a sunflower plant is taken and kept in sunlight. It will be observed that the flower head of sunflower will move from east to west along with the movement of Sun. This shows that the flower head of sunflower is positively phototropic and moves in response to sunlight stimulus.
संबंधित प्रश्न
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
What is made in anther of a flower?
What changes take place in the flower after fertilisation which lead to the formation of seeds and fruit?
Which of the following statements are true for sexual reproduction in flowering plants?
(i) it requires two types of gametes
(ii) fertilisation is a compulsory event
(iii) it always results in the formation of zygote
(iv) offsprings formed are clones
(a) (i) and (iv)
(b) (i), (ii) and (iv)
(c) (i), (ii) and (iii)
(d) (ii), (iii) and (iv)
Put a tick mark (✓) against the correct alternative in the following statement
Pollen is produced in the:
Find the odd-one out, giving reason:
Anther, pollen grain, ovule male gamete
“Cell division is a type of reproduction in unicellular organism.” Justify.
Find the odd one out:
The ovule of an angiosperm is technically equivalent to ______
Pineapple fruit develops from ______.
