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Hormonal Regulation of the Male Reproductive System At the onset of puberty in males, the hypothalamus begins secreting high pulses of GnRH or gonadotropin-releasing hormone. In response, the pituitary gland releases follicle stimulating hormone (FSH) and luteinizing hormone (LH) into the male system. Take a look at the…
Placenta Our body has many organs, like the heart, lungs and stomach. These organs are present in our body from the time of our birth and work incessantly to keep us alive and healthy. But, did you know that when…
Parturition The process of delivery of the foetus is called parturition. It is induced by a complex neuroendocrine mechanism. The signals of parturition originate from the fully developed foetus and the placenta. These signals induce mild uterine contractions; called foetal ejection reflex.…
Difference in between Identical twins and fraternal twins Fraternal twins Same Same but Different Pregnancy start when a sperm fertilises an egg. This fertilised egg is called a zygote. Usually one egg is released from a ovary but sometimes a woman’s…
Fraternal twins or dizygotic twins Same Same but Different Pregnancy start when a sperm fertilises an egg. This fertilised egg is called a zygote. Usually one egg is released from a ovary but sometimes a woman’s ovary might release two eggs.…
Difference in between Colostrum and Breastmilk Colostrum and BreastmilkColostrum is often referred to as ‘first milk’, and is produced by all mammals. It is thick and yellow in colour, typically available in the days immediately after birth. Colostrum is higher in…
Difference in between Sperm and Semen Sperm and SemenPondering over sperm and semen and wondering how they differ? Well, semen and sperm are like squares and rectangles. Sperm is a part of semen but semen isn’t a part of sperm. Sperm cells are male…
Difference in between Spermatogenesis and Spermiogenes Spermatogenesis and Spermiogenes Spermatogenesis and spermiogenesis are two stages that occur during the formation of the male gametes i.e. the sperms. The main difference between spermatogenesis and spermiogenesis is that spermatogenesis is the term…
Sexual Reproduction In Flowering Plants Formation of Megaspores (Megasporogenesis)A single megaspore mother cell in the ovule undergoes meiotic division in the micropylar region of the nucellus. Meiotic division results in the formation of four megaspores. ‘The process of formation of megaspores from…
Sexual Reproduction In Flowering Plants 1MegasporogenesisAre you finding difficult to memorise the process of megasporogenesis? Let us do it step by step through the given GIF. 2Ploidy of Different CellsAre you finding hard to remember ploidy of different cells involved…
Sexual Reproduction In Flowering Plants-Diagram 1 Section of a Young Anther and a Dehisced Anther 2 Formation of a Pollen Grain 3 Anatropous Ovule 4 Double Fertilization 5 Megasporogenesis
Sexual Reproduction In Flowering Plants Morphology of Flower Flowers are the primary reproductive organs of the plants. They are attractive, colourful, often fragrant and nectar producing structures of flowering plants. The flower is commonly borne on short or long stalk called the pedicel.…
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Sexual Reproduction In Flowering Plants-Concept Microsporangium 1. Structure in plant’s male reproductive organ which develops into pollen sac2. Each anther has fourmicrosporangia3. Development of pollen takes place here Structure of Microsporangium and Formation of Pollen 1. Surrounded by four wall layers –…
Reproduction in Organism-Diagrams 1 Binary Fission in Amoeba 2 Multiple Fission 3 Budding in Yeast 4 Budding in Hydra 5 Regeneration in Starfish 6 Fragmentation in Spirogyra 7 Types of Gametes 8 Sexuality in Animals 9 Sexuality in Plants 10 Homogametic Transfer in…
Reproduction In Organisms-Concepts Advantages and disadvantages of asexual reproduction Advantages1. It is uniparental reproduction, therefore, a mate is not required.2. It involves simple processes of division, amitosis, and mitosis.3. It is a quick mode of reproduction.4. A single parent may…
Reproduction In Organisms-Mind Map
Solutions – Chapter 2 CBSE Class 12 Chemistry Short Answer Questions – 3 marks Q. 1. At 25°C the saturated vapour pressure of water is 3.165 kPa (23.75 mm Hg). Find the saturated vapour pressure of a 5% aqueous solution…
Solutions – Chapter 2 CBSE Class 12 Chemistry Short Answer Questions – 2 marks Q. 1. State Henry’s law. Write its one application. What is the effect of temperature on solubility of gases in liquid? [CBSE (F) 2016] Ans. It…
Solutions – Chapter 2 CBSE Class 12 Chemistry Very Short Answer Questions Q. 1. Define mole fraction. [CBSE Delhi 2012] Ans. Mole fraction of a component in a solution may be defined as the ratio of moles of that component…