Question
Explain the reproductive organs of Flowering plants.
✓
Answer
→ The reproductive parts of angiosperms are located in the flower. We have already studied the different parts of a flower - sepals, petals, stamens and pistil. Stamens and pistil are the reproductive parts of a flower which contain the germ cell.
→ Petals and sepals protect the flower in budding stage. They do not take part in reproduction.
→ The flower may be unisexual (papaya, watermelon) when it contains either stamens or pistil or bisexual (Hibiscus, mustard) when it contains both stamen and pistil.
⇒ Stamen is the male reproductive part and it produces pollen grains that are yellowish in colour. You must have seen this yellowish powder that often sticks to our hands if we touch the stamen of a flower.
⇒ Pistil is present in the centre of a flower and is the female reproductive part. It is made of three parts.
(1) The swollen bottom part is the ovary.
(2) Middle elongated part is the style.
(3) Terminal part which may be sticky is the stigma.
⇒ Stigma is usually sticky. The ovary contains ovules and each ovule has an egg cell. The male germ-cell produced by pollen grain fuses with the female gamate present in the ovule. This fusion of the germ-cells or fertilisation gives us the zygote which is capable of growing into a new plant.
→ Petals and sepals protect the flower in budding stage. They do not take part in reproduction.
→ The flower may be unisexual (papaya, watermelon) when it contains either stamens or pistil or bisexual (Hibiscus, mustard) when it contains both stamen and pistil.
⇒ Stamen is the male reproductive part and it produces pollen grains that are yellowish in colour. You must have seen this yellowish powder that often sticks to our hands if we touch the stamen of a flower.
⇒ Pistil is present in the centre of a flower and is the female reproductive part. It is made of three parts.
(1) The swollen bottom part is the ovary.
(2) Middle elongated part is the style.
(3) Terminal part which may be sticky is the stigma.
⇒ Stigma is usually sticky. The ovary contains ovules and each ovule has an egg cell. The male germ-cell produced by pollen grain fuses with the female gamate present in the ovule. This fusion of the germ-cells or fertilisation gives us the zygote which is capable of growing into a new plant.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Shalini is a student of class X. Her mother was preparing tea in an old electric kettle having metal case. When she switched on the electric kettle, she got a severe electric shock.Shalini put off the main switch quickly and found that the connecting cord was torn, where her mother touched the metal case of the kettle. She also found that the red and black wires of the connecting cord were firmly connected to the two lower terminals of the power plug but the green wire of the cord was not connected to the upper terminal of the plug.Shalini replaced the torn connecting cord and also connected the three wires of the cord firmly to the power plug terminals.On the basis of the above passage, answer the following questions :
(1) Why did Shalini switch off the main switch quickly?
(2) Which wire red, black or green, touched the metal case of electric kettle when Shalini's mother got electric shock?
(3) What values are displayed by Shalini in this incident?
(1) Why did Shalini switch off the main switch quickly?
(2) Which wire red, black or green, touched the metal case of electric kettle when Shalini's mother got electric shock?
(3) What values are displayed by Shalini in this incident?
What are the methods to prevent corrosion?
Give scientific reason:
Proper transportation (conducting) system is necessary in higher plants.
Proper transportation (conducting) system is necessary in higher plants.
Write the balanced chemical equation for the following reactions and identify the type of reaction in each case.
$(a)$ In Thermite reaction, iron $(III)$ oxide reacts with aluminium and gives molten iron and aluminium oxide.
$(b)$ Magnesium ribbon is burnt in an atmosphere of nitrogen gas to form soli d magneslum nitride.
$(c)$ Chlorine gas is passed in an aqueous potassium iodide solution to form potassium chloride solution and solid iodine.
$(d)$ Ethanol is burnt in air to form carbon dioxide, water and releases heat.
→$(a)$ In Thermite reaction, iron $(III)$ oxide reacts with aluminium and gives molten iron and aluminium oxide.
$(b)$ Magnesium ribbon is burnt in an atmosphere of nitrogen gas to form soli d magneslum nitride.
$(c)$ Chlorine gas is passed in an aqueous potassium iodide solution to form potassium chloride solution and solid iodine.
$(d)$ Ethanol is burnt in air to form carbon dioxide, water and releases heat.
What precaution should be taken to avoid the overloading of domestic electric circuits?
What is used for whitewashing of the walls of the house carried out? Explain the preparation by showing chemical equation.
What is atmospheric refraction? Explain briefly.
You must have seen tarnished copper vessels being cleaned with lemon or tamarind juice. Explain why these sour substances are effective in cleaning the vessels.
Write a note on - "Properties of ionic compound." (Here we don't need to describe the experiment but need to give detailed explaination of their properties.)
Your uncle often complains about indigestion of after having oily food. He consults a doctor and is diagnosed with stone in gall bladder. Doctor advised him to remove gall bladder surgically.
(1) What is the function of gall bladder?
(2) Which process initiates the digestion of oils?
(3) After surgery, which type of food should be given to uncle?
(1) What is the function of gall bladder?
(2) Which process initiates the digestion of oils?
(3) After surgery, which type of food should be given to uncle?