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Plant resemblance. c Neither. Uploaded by. Seeds are dropped all along this route. Topic 11~13. Topic 05~07. 11. D seed dispersal á ZZZ VDYHP\H[DPV FR XN 16. Short-day plants - require less than 12 hours of daylight to flower and seed. [1 mark] 1. i) A plumule; B cotyledon, C testa (seed coat) ii) X on any part of the cotyledon. . b Seeds. reasons for your answers. Predators target areas which have a high concentration of seeds as they have to spend a lesser amount of time and energy. Disadvantages. Wind-dispersed seeds Fruits contain seeds, and usually have a parachute or a wing to help them be carried away from the parent plant by the . The main stem now breaks and the plant laden with ripe fruits and seeds is rolled like a ball miles after miles by the strong wind. type of reproduction in flowering plants advantages disadvantages asexual only one, parent / plant ; fast ; . Fruits like coconut have fibrous mescocarp which is spongy to trap air, the trapped air make the fruit light and buoyant to float on water. [3] The seeds can germinate in an area far from its . Students may also place a healthy plant anther with pollen (without treating it with alcohol . 2. Some seeds have small hooks which stick to the fur of animals. . Seed dispersal. . An animal may eat the fruit and the seed, inside, is resistant to the digestive juices hence it passes out through faeces. DC (NF/CGW) 99153/3 © UCLES 2015 [Turn over Cambridge International Examinations Cambridge International . 1 2 3 [3] It is the production of genetically identical offspring from one parent. 6 © UCLES 2015 0610/22/F/M/15 3 (a) Fig. ADVANTAGES OF ASEXUAL REPRODUCTION to a species in the wild and crop production: . Plants which grow beside water often rely on water to transport their seeds for them. Describe one method of seed dispersal that does not require animals. 11 The root of the pea seedling is marked with equally spaced lines as shown here. includes seed structure, seed and fruit dispersal, ante-natal care to include comparison between breast and bottle These methods are wind dispersal and animal dispersal. Produces seeds which are dispersed Page 74 1. Asexual Reproduction Definition. IGCSE Biology Semester 3. 2. . Many are killed on the roads and development threatens their rainforest habitat. Free PDF (link in description) Pearson Edexcel International AS Level Chemistry Student Book 1 . . Seed dispersal by animals and wind 13.39 FRUITS ARE OVARIES AFTER FERTILISATION. Method # II. These will be Paper 1, one from either Paper 2 or Paper 3, and one . <p>It has hooks to hook onto the fur of animals</p>. What is the correct sequence for events after pollination? Two nuclei of gametes fuse = fertilisation Forming the zygote Each ovule in ovary . Edexcel Igcse Biology Revision Notes Edexcel International GCSE Biology Student Book Second Edition-Erica. 27 Seed dispersal, fertilisation, seed germination and pollination are processes in plant reproduction. ref to benefits to, environment ; ref to more desirable, . 1. . as shown here. the benefits and drawbacks of scientific and technological developments, including those . [2] (d) State two environmental conditions that seeds require so that they can germinate. 10 The drawings show seeds or fruits of different plants. [2] (d) State two environmental conditions that seeds require so that they can germinate. Also, it is possible to obtain several generations of a particular kind of plant with some special . Natural methods of asexual reproduction include self-propagation. Asexual reproduction in bacteria : Bacteria are unicellular microscopic organisms. Answer: The seeds of a blackberry are not digested by animals' digestive systems. Natural Methods. Advantages of sexual reproduction are: Variation among offspring, and therefore more adaptable to a changing environment ; More likely to withstand disease ; In plants, seed dispersal reduces competition for nutrients as offspring will grow in a different environment; Disadvantages of sexual reproduction are: Requires the fusion of two gametes Although seeds of plants that grow in water are obviously spread by water, there are many other ways in which water plays a part in dispersing seeds. 8. It has a fibrous husk that makes it float. CHAPTER 13: REPRODUCTION 13.1 ASEXUAL REPRODUCTION PRODUCES . Inside bacterium cell, the DNA replicates. A dispersal → fertilisation → germination B dispersal → germination → fertilisation C fertilisation → dispersal → germination D germination → fertilisation → dispersal The photo on the left is of a dandelion plant. A stem tuber has several eyes on the surface. Assessment Objective Weighting A Knowledge with Understanding 50% (not more than 25% recall) B Handling Information and Problem Solving 30% C Experimental Skills and Investigations 20% 3. Mycoprotein is a high-protein meat-substitute for vegetarians. Once all relevant is direct cutover advantages and disadvantages less seed. The different ways in which a plant self propagates are mentioned below: Plants such as ginger, onion, dahlia, potato, grow from the buds present on the surface of the stem. Cambridge IGCSE™, Cambridge International A and AS Level and Cambridge Pre-U components, and . This method involves a mechanical action that physically throws or shoots the seeds away from a seed pod. No additives /preservatives Builds mother-child bond No cost/preparation Causes decline in uterus size Less painful Other people can feed baby May contain supplement vitamins and minerals DISADVANTAGES May be painful Mother must be present . A plant can use any of two methods of seed dispersal. Seed Dispersal is a natural process, it is an adaptive mechanism that can be seen in all seed-bearing plants, it can be defined as a method by which seeds move away (or are transported away) from their parent plant in order to germinate and survive at a different place. Enters ovary through small hole = micropyle 5. Plants growing near a river . Advantages of Asexual Reproduction • Only one parent is needed. Dispersal by Water. . Strawberries are just one fruit that scatters seeds through digestion and . floating seeds for (seed) dispersal (carried on water) / reduce competition (from parent) . Some seeds are transported by the wind and are shaped to float, glide or spin through the air. Through fruit. The advantages of dispersal are (a) that the seedlings are less likely to compete with each other if the seeds are widely dispersed, (b) that new areas may be colonised. Epihydrophily: This process of dispersal by water occurs on the surface of the water. floating seeds for (seed) dispersal (carried on water) / reduce competition (from parent) . 2. This is an advantage, as the qualities borne by the parents are passed on to the offspring without any variation. continued to grow vertically. 6.2 to explain the advantages of using predators, such as spiders, to control brown plant hoppers. This shoots the seeds sort of like the pellets from a shotgun. It is the production of genetically identical offspring from one parent. Cambridge IGCSE Chemistry (0620) Topic 01~04. It is light and has wing-like structure. Label with a Y the special feature of the seed or fruit that helps in wind dispersal. Many are killed on the roads and development threatens their rainforest habitat. It contains exercises that will help students to develop the skills needed to succeed in the Cambridge IGCSE Biology examination and invites students to match their Page 1/2 Seeds are a protective structure that lets a plant embryo survive for long periods of time before it germinates. If test data . It is seen in the Vallisneria plant. Population: a number of individuals of the same species living in the same area at the same time. Modern machinery -makes growing and harvesting crops much faster and easier. Identify the structures labelled P , Q , R and S . Wind dispersal depends on the fruit having wind or parachute like structure that allows it to float in air to be carried by wind to distant areas in order to spread the species. Sexual reproduction in flowering plants including pollination, fertilisation, seed formation and dispersal. IGCSE ICT Implementing a System ICT Lounge. • Describe the advantages and disadvantages of breast-feeding compared with bottle-feeding using formula milk. . 1. Plant Sexual Reproduction—Sperm carried in the pollen from the male part of a flower fuses with the egg in the female part of the flower. • Describe the advantages and disadvantages of breast-feeding compared with bottle-feeding using formula milk. The procedure involves the following simple steps: Wash the pollen grains using alcohol and place the sample on a microscope slide (also keep an unwashed sample) Add 50 percent glycerine to the sample and place under the stereo microscope for viewing. The disadvantage is that a large proportion of seeds may land in situations where they cannot grow. Plants like water lily produce seeds whose seed coats trap air bubbles. i)Sketch a seed or fruit that is adapted for dispersal by wind. Dispersal of Seeds by Animals. IGCSE BIOLOGY. 2. There are 4 levels of organisation within an ecosystem: Individual organism: a single member of a species. 40 Sexual Reproduction in Plants Mr. C Biology 14 January 15, 2014 •This is the carrying of the seed as far as possible from the parent plant •The methods of seed dispersal are: Wind Use parachutes or wings to help dispersal (dandelion, sycamore) There are 24 cards in the pack, made up of six sets of four cards. In the asexual reproduction of plants, the new plants resemble exactly the parents from which they were produced. Circulatory system. International-gcse-9-1-biology-student-book-pdf-free.pdf. A piece of cotton is held by the hairpin The air bubbles make the seeds float on water and are carried away. V1 1Y07 Science Stage 9 16 fScheme of Work - Science stage 9 Unit 2A: 9.4 Sexual Reproduction and Flowering Plants In this unit, pupils build on their previous knowledge reproduction and plant growth to develop their knowledge of. Seed dispersal Development of the seed and fruit Fruits aid seed dispersal The ovary wall becomes either a dry or . 2. 3. Some plants make use of water to disperse their seeds. Rhubarb. years, the ADA's Council on Dental Benefits has fielded questions . Updated: 01/06/2022 Create an account If this happens it will die. 1. (seed) dispersal ; colonization / able to adapt to change ; max 1 may need two plants / pollinating agent; 6.2 to explain the advantages of using predators, such as spiders, to control brown plant . #seeds #science #teachingI wrote this one for my elementary science classes to help them learn about seeds and seed dispersal.Purchase on iTunes: https://goo. It has dry pods that split open. . #110 Seed dispersal The flowers produce seeds which can be dispersed by the wind or other animals, providing a means of colonising new areas. Peas. In envelope to deplete this effectively . Describe three possible advantages of using foods prepared from mycoprotein as substitutes for animal products, such as meat. Spore production in fungi. (A)Seed dispersal is the best method to avoid competition because it allows plants to widespread and avoids competing with each other for the same food. It can be used to help you to plan your revision programme for the theory examinations and will explain what the examiners are looking for in the answers you write. Advantages and disadvantages. Breeding Stock. International GCSE in Biology (0610) to this qualification 4 Section B: Assessment 7 . Nucleus of pollen enters ovule 7. 3.1 shows some of the structures present in the human thorax (chest). Asexual Reproduction Definition. By dispersing the seeds over a large area, a parent plant gives the seeds a greater chance at finding space and untapped resources. With those advantages, the seeds stand a much better chance at . The asexual form of reproduction leads to prolific multiplication of organisms. There is seed dispersal; There is colonization; DISADVANTAGES OF SEXUAL REPRODUCTION TO AN ANIMAL SPECIES: STUDY. Plants disperse their seeds in lots of different ways. Learn vocabulary, terms, and more with flashcards, games, and other study tools. This pedicel helps the plant to reach the surface of the water. (i) Name the part of the flower that develops into the seed. Topic 05~07. (a) From the appearance of the structures, make a guess at how each one is dispersed giving . Flower Structure Pollination Fertilisation Seed Dispersal Germination Test . The process is more or less like cloning. . Use the information in Fig. The zygote will start to divide and eventually form a seed within the ovule; As different plants have different numbers of ovules, this explains why different fruits (which develop from the ovary . State an advantage of seed dispersal. Solution. It also contains one matured ovary. The hyphae are processed to give a meat like texture. germination, the sprouting of a seed, spore, or other reproductive body, usually after a period of dormancy. PLAY. Describe one method of seed dispersal that does not require animals. 3 - Pesticides and herbicides- kill off weeds and bugs that are not wanted, allowing crops to grow larger and more rapidly. CIE IGCSE BIOLOGY//0610 P AGE 26 OF 35 BREAST FEEDING BOTTLED MILK ADVANTAGES Has antibodies - no bacteria Nutrients- correct proportion Correct temp.