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प्रश्न
Trace the path a male gamete takes to fertilise a female gamete after being released from the penis.
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उत्तर
Male gamete (sperm) travels in the female reproductive tract after being released. The path which it takes to fertilise the female gamete (egg) is the vagina, uterus, fallopian tube resulting in a zygote; Alternatively, accept the labelled figure of the human female reproductive system indicating the passage of sperm from vagina to uterus and then to fallopian tube for fertilisation resulting in a zygote.
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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
You are asked by your teacher to study the different parts of an embryo of a gram seed. Given below are the steps to be followed for the experiment:
I. Soak the gram seeds in plain water and keep them overnight.
II. Cut open a soaked seed and observe its different parts.
III. Take some dry gram seeds in a petri dish.
IV. Drain the excess water.
V. Cover the soaked seeds with a wet cotton cloth and leave them for a day.
The correct sequence of these steps is :
(A) III, I, V, IV, II
(B) III, I, II, IV, V
(C) III, IV, V, I, II
(D) III, I, IV, V, II
The length of pollen tube depends on the distance between :
(a) pollen grain and upper surface of stigma
(b) pollen grain on upper surface of stigma and ovule
(c) pollen grain in anther and upper surface of stigma
(d) upper surface of stigma and lower part of style
Fill in the blank by selecting suitable word:
A flower bearing only male or female parts is known as __________ flower.
What part is played by stamens and carpels in reproduction?
__________ is present in unisexual flower.
Write the functions of sepals
Draw a neat and labelled diagram.
Double fertilization in angiosperms
Draw the diagram of a flower and label the four whorls. Write the names of gamete producing organs in the flower.
In flowering plants, the pollen grains are transferred to stigma by pollination but the female germ cells are present in the ovary.
Explain with the help of a labelled diagram (only concerned parts), how the male germ cell reaches the ovary.
