In the last year board examination, Arun was asked a question where he had to choose the statement which was/were incorrect? Will you be able to answer this question?
(a) The transfer of pollen grains from the anther of a stamen to the stigma of a pistil is called pollination.
(b) The process in which the male gamete present in pollen grain fuses or joins with the female gamete present in the ovule to form a new cell called zygote, is called fertilization.
(c) When a pollen grain falls on the stigma of a pistil, the pollen grain grows a pollen tube downwards through the style towards the female gamete in the ovary.
(d) None of the above.
Correct Answer: (d) None of the above.
Explanation:
The transfer of pollen grains from the anther of a stamen to the stigma of a pistil is called pollination.
The process in which the male gamete present in pollen grain fuses or joins with the female gamete present in the ovule form a new cell called a zygote, which is called fertilization.
When a pollen grain falls on the stigma of a pistil, the pollen grain grows a pollen tube downwards through the style towards the female gamete in the ovary.
Related Articles
- Define the terms pollination and fertilization. Draw a diagram of a pistil showing pollen tube growth into the ovule and label the following: pollen grain, male gamete, female gamete and ovary.
- 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
- (a) Draw a diagram showing germination of pollen on the stigma of a flower and mark on it the following organs/parts :(i) Pollen Grain(ii) Pollen tube(iii) Stigma(iv) Female germ cell(b) State the significance of the pollen tube.(c) Name the parts of the flower that develop after fertilization into(i) Seed(ii) Fruit
- DIRECTIONS: Read the passage(s) given below and answer the questions that follow. Passage- The transfer of pollen from another to the stigma of a flower is called pollination. If the pollen lands on the stigma of the same flower it is called self-pollination. When the pollen of a flower lands on the stigma of another flower of the same plant, or that of a different plant of the same kind, it is called cross-pollination. Which of the following can carry pollen grains?(a) wind.(b) water.(c) both wind and water.(d) none of these.
- The anther contains(a) sepals(b) ovules(c) pistil(d) pollen grains
- DIRECTIONS: Read the passage(s) given below and answer the questions that follow. Passage- The transfer of pollen from the another to the stigma of a flower is called pollination.If the pollen of a flower lands on the stigma of the same flower, or on the stigma of another flower of the same plant, it is called self-pollination. When the pollen of a flower lands on the stigma of another flower of a different plant of the same kind, it is called cross-pollination.In cross-pollination,(a) the pollen of a flower lands on the stigma of another flower of the same plant.(b) the pollen of a flower lands on the stigma of another flower of a different plant of the same kind.(c) both the above are correct.(d) none of these is correct.
- Flowers reproduce using pollination and fertilization. Put the steps of these processes in order. Start with the first step of pollination, and end with the last step of fertilization.i) A seed is formed.ii) A grain of pollen combines with an ovule.iii) Pollinators land on a flower and some pollen gets stuck on the stigma.iv) A pollen tube grows down the style.v) Pollinators land on a flower and pick up pollen on their bodies.
- Fertilisation Is the Process of (A) Transfer of Male Gamete to Female Gamete. (B) Fusion of Nuclei of Male and Female Gamete. (C) Adhesion of Male and Female Reproductive Organs. (D) The Formation of Gametes by A Reproductive Organ. Justify Your Answer.
- Fill in the blanks:(a) The production of new individuals from the vegetative part of the parent is called _____.(b) A flower may have either male or female reproductive parts. Such a flower is called _______.(c) The transfer of pollen grains from the anther to the stigma of the same or of another flower of the same kind is known as _____.(d) The fusion of male and female gametes is termed as _____.(e) Seed dispersal takes place by means of _____, _____, and _____.
- Which of the following statements is/are false?a. The male gamete is larger, with a nucleus and more cytoplasm than the female gamete. b. The fusion of the two gametes is called fertilization. c. The product of fusion of the two gametes is called the zygote.(a) Only a(b) Only a and b(c) Only b(d) Only b and c(e) Only c
- In the last year board examination, Rahul were asked a question where he had to choose the statement which was/were incorrect? Will you be able to answer this question?(a) Prediction of weather in advance is called weather forecasting.(b) The scientific study of weather is called meteorology.(c) The times of sunrise and sunset also change during the year.(d) Days are longer in winter and nights are shorter, on the other hand days are shorter in summer but nights are longer.
- DIRECTIONS: Read the passage(s) given below and answer the questions that follow. Passage- The cell which results after fusion of gametes is called a zygote. The fusion of male and female gametes (to form a zygote) is called fertilization. The zygote develops into an embryo. The cell which results after fusion of male gametes and female gametes is called(a) zygote(b) fertilization(c) embryo(d) none of these
- What is the meaning of pollen tube?
- Draw a neat diagram showing fertilisation in a flower and label (a) Pollen tube, (b) Male germ cell and (c) Female germ cell, on it. Explain the process of fertilisation in a flower. What happens to the (i) ovary and(ii) ovule after fertilisation?
- The growth of a pollen tube towards the ovule caused by a sugary substance as stimulus is an example of: (a) phototropism (b) chlorotropism (c) gravitropism (d) chemotropism
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