Advertisements
Advertisements
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
Advertisements
उत्तर
(i) Testis : Anther
In animals, testis is the male reproductive organ that produces sperms. Similarly, in plants, anther is the male reproductive part that produces pollen grains.
(ii) Sperm : Pollen grains
Sperm is a male gamete in animals. In plants, pollens are male gametes. The generative cell of pollen divides to produce two nuclei called male gametes.
(iii) Ovary : Ovary
In animals, ovary is the female reproductive organ that produces eggs. Similarly, in plants, ovary is the female reproductive organ that contains ovules.
(iv) Egg : Ova/Ovum
Eggs in animals are also called ova. In plants, eggs are present inside the female gametophyte, i.e., ovule.
APPEARS IN
संबंधित प्रश्न
Name the swollen lower part of the carpel.
Fill in the following blank with suitable word :
Pollen grains contain ............ gametes of a plant.
Fill in the following blank with suitable word :
The.......... at the base of the carpel contains egg cells.
In what ways is fertilisation in a plant similar to fertilisation in a human?
In what ways is fertilisation in a plant different from fertilisation in a human?
Give one example each of unisexual and bisexual flowers. Differentiate between the two types of pollination that occur in flowers. What happens when a pollen lands on a suitable stigma? Write about the events that occur till the seed formation in the ovary.
The students of a class were asked by the teacher to study the different parts of an embryo of an angiosperm. Given below are the essential steps for the experiment :
A. Soak the seeds in plain water and keep them overnight.
B. Cut open the soaked seed and observe its different parts.
C. Take some healthy seeds in a petri-dish.
D. 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) C, A, D, B
(b) C, D, A, B
(c) A, C, D, B
(d) A, C, B, D
Give scientific reason.
Fertilization in plants is called double fertilization.
Which of the following is the outermost protective layer of anther?
- Assertion: Primary endosperm nucleus is diploid.
- Reason: It is the product of double fertilisation.
