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प्रश्न
In tobacco plant, the male gametes have 24 chromosomes.
What is the number of chromosomes in the female gamete?
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उत्तर
The number of chromosomes in a female gamete is equal to the number of chromosomes in a male gamete, i.e., 24.
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संबंधित प्रश्न
Name the parts A, B and C shown in the diagram and write their functions.
Give one example of a unisexual flower.
State the function of flowers in the flowering plants.
Fill in the following blank with suitable word :
Pollen grains contain ............ gametes of a plant.
Fill in the following blank with suitable word :
The term used to refer to the transfer of pollen from the stamen of one flower to the carpel of another flower of the same species is...........
What is made in ovary of a flower?
What is meant by 'unisexual flowers' and 'bisexual flowers'? Give two examples of each.
Which of the following statements are true for flowers?
(i) Flowers are always bisexual.
(ii) They contain sexual reproductive organs.
(iii) They are produced in all groups of plants.
(iv) after fertilization they give rise to fruits.
Fill in the blank by selecting suitable word:
A flower that bears both the male and the female parts is known as __________ flower.
Fill in the blanks:
A carpel consists of ________ , ________ and ________.
What are the male and female gametes in a flowering plant?
Identify A, B, C and D in the given diagram and write their names.
Distinguish between unisexual and bisexual flowers giving one example of each. Draw a diagram showing process of germination of pollen grains on stigma and label the following parts:
(a) Female germ cell
(b) Male germ cell
(c) Ovary
Which of the following are the chemical components of the wall of pollen tube?
Which of the following is the outermost protective layer of anther?
Flowers showing ornithophily show few characteristic like ______.
Complete the table
| Carly x | ______ | ______ |
| ______ | petal | attract insects |
| Androecium | ______ | Male reproductive part |
| ______ | ______ | Female reproductive part. |
State the number of sets of chromosomes present in a zygote.
State the post-fertilisation changes that lead to fruit formation in plants.
- Assertion: Primary endosperm nucleus is diploid.
- Reason: It is the product of double fertilisation.
