N. C Jindal Public School Assignment-Chapter-2 Sexual Reproduction in Flowering Plants Biology Class XII 1. What is meant by monosporic development of a female gametophyte? 2. Name the part of flower that contributes to fruit formation in strawberry and Guava respectively 3. With a neat diagram explain the 7-celled‚ 8-nucleate nature of the female gametophyte. 4. Why is it necessary to emasculate a bisexual flower in a plant breeding programme? How it is done? Mention the condition under which emasculation
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Q1. Why is reproduction necessary in living organisms? If organisms don’t reproduce‚ then after their death‚ there would be no organisms left of their species. Thus their species would perish. Q2. Differentiate between Sexual and Asexual reproduction. |Sexual Reproduction |Asexual reproduction | |1. It is characterized by the fusion of two cells (Gametes) usually coming from
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Plants have two different ways to reproduce. The first one is vegetative reproduction. With this type all the plants that have the same parent have the same genetic make-up. This also lets plants pass adaptations on that they have abtained over the years. Plants with good genetic make-up usually spread quickly and take over an area. An example of this would be the dandelion. These plants can sprout from any part of the plant. An example of this is the potato‚ farmers will pick the potatoes and cut
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6. Anatomy of Flowering Plants Tissue It is a group of cells that are similar in structure and are organised together to perform a specific function. It is of two types: Meristematic tissues and Permanent tissues Meristematic tissue It consists of actively dividing cells that are found in those regions of the plant body that show growth. The examples include root tip‚ shoot tip‚ and base of the leaves. It is classified into three types: i. Apical meristem: They are present in
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fertilization in flowering plants‚ one sperm cell fuses with an egg cell to form a zygote and a second sperm fuses with two polar nuclei to form _____________. Correct B ) endosperm he process by which one of the two sperm nuclei fuses with the egg nucleus to produce a diploid zygote and the other fuses with the polar nuclei to produce a triploid endosperm the transfer of pollen grains from an anther to the stigma of the same flower or to the stigma of another flower on the same plant
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The relationships between plant reproduction and human reproduction are that they both create an egg. There are feminine and masculine parts wanted in both progressions. Both produce descendants by sexual reproduction. The change among plant reproduction and human reproduction include that in pinnacle plants you have to plant the seed before it will develop into whatsoever‚ and in human reproduction you do not have to plant the seed it take a long procedure. Flowering plants create many more offspring
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Anatomy of flowering plants deals with the study of internal structure of various organs of flowering plants. The tyloses are the structures present in the woody tissues of dicot stems. These are the extension of xylem parenchyma cells into the vessel elements(NEET-II 2016). Cortex tissue is present in between the epidermis and stele. It is multilayered and is made up of parenchymatous cells with big intercellular spaces (NEET-II 2016). Wood of gymnosperms does not contain vessels.e.g- Pinus is
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Sexual reproduction has been successful among flowering plants and mammals‚ it is brought by the following requirements. Firstly is the transfer of gametes. Sexual reproduction is only made successful when the gametes of the male and female from a pair of parents of different sexes are transferred to meet each other. In mammals‚ the male gamete is transferred to the female body by copulation to meet with the female gamete in the oviduct for successful fertilization. However‚ the ovum is only
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Plant Sexuality BIO 210- 01 Plant sexuality has a wide range of topics about sexual reproduction systems found across the plant kingdom. Flowers‚ which are the reproductive units of angiosperms‚ amongst all living things are physically varied the most. They also show the greatest diversity in methods of reproduction of all biological systems. The system for classifying flowering plants was proposed by Carolus Linnaeus‚ which is based on plant structures. Plants employ several different
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* NCERT 1. Reproduction in Organisms INTRODUCTION Biology in essence is the story of life on earth. While individual organisms die without fail‚ species continue to live through millions of years unless threatened by natural or anthropogenic extinction. Reproduction becomes a vital process without which species cannot survive for long. Each individual leaves its progeny by asexual or sexual means. Sexual mode of reproduction enables creation of new variants‚ so that survival advantage is enhanced
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