Cell structure and organization • Chloroplasts o Site of photosynthesis where light energy is absorbed o Consist of grana which are stacked up to increase surface area for absorption of light o Only present in plant cells • Cell membrane (plasma membrane) o Lipid bilayer that surrounds the cell‚ interspersed with protein molecule o Presence of temporary pores o Selectively permeable Controls movement of substances o Diffusion‚ osmosis and active transport can therefore take place o Prevent outflowing
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All of us want India to become a respectable super power in the world. India ha a rich past. it was because of its riches‚ that it was invaded innumerable times and its wealth was plundered. The British rulers exploited the country. At the time of independence‚ the country was in turmoil‚ its economy had been shuttered and there was unrest all around. In sixty years since independence‚ the country has made tremendous progress. However‚ it is still for behind the developed counties of the world
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AQA GCSE Revision Topics B1a Human Biology MULTIPLE CHOICE QUESTION PAPER B1a. 1. Co-ordination and control p24 Responding to change Nervous system - neurones Hormones – glands Notes understand p26 Reflex action Reflex arc pathway synapse p28 Menstrual cycle FSH‚ oestrogen‚ LH‚ ovulation p30 Artificial control of fertility Contraceptive pill IVF treatment p32 Controlling conditions Water & ions – kidneys Temperature Blood glucose – insulin
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According to “Climate” by Marietta College‚ there are two types of deserts‚ subtropical and temperate. Both of these deserts receive less than 100 centimeters of precipitation per year‚ earning them the classification of desert. Desert plants must undergo many adaptations in order to survive the unusually dry conditions that are associated with a desert. There is a long list of adaptations‚ but some of the most common are the reduction of leaves‚ development of the stem as a major photosynthetic
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1a.What logistics management? b. State the six rights in an effective logistics management system. Logistics is defined as process of planning‚ implementing‚ and controlling the efficient flow and storage of goods‚ services‚ and related information from point of origin to the point of consumption for the purpose conforming to customer requirement‚ which also includes the inbound‚ outbound‚ internal‚ and external movements and return of materials for environmental purposes. Logistics Management
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Pak Education – House of Learning Sir Adnan www.PAK-EDUCATION.com BOARD OF SECONDARY EDUCATION‚ KARACHI S.S.C. (ANNUAL) EXAMINATION‚ [2008 – 2013] BIOLOGY THEORY – (Class IX) – SCIENCE GROUP MCQs – (MULTIPLE CHOICE QUESTIONS) CHOOSE THE CORRECT ANSWER FROM THE GIVEN OPTIONS: (1) Tuberculosis is caused by: (A) Virus (2) It is not an alga: (A) Chlorella (3) It is an insectivorous plant: (A) Nostoc (B) Bacteria (C) Worm (D) None of them (B) Volvox (C) Spirogyra
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Table 1a. Biotic components of artificial ecosystem. Biotic Component Habit or Type Number Distribution pattern Physical factors affecting organism Autotrophs Plants Ixora Capsicum frutescens Ananas comosus Dracaena reflexa Basella rubra Papaya Allium cepa Bougainvillea Ocimum basilicum Allium sativum Tarragon Sweet potato Moringa oleifera Taro Pandan Anethum graveolens Cranberry Phaseolus lunatus Plectranthus scutellarioides Curcuma longa shrub herb herb shrub herb tree herb vine herb herb
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Effect of ions on living organisms (24 marks) An ion is a charged atom or molecule. This is because it does not have an equal amount of protons and electrons‚ therefore giving the atom an overall charge. An example of an ion is ‚ this is sodium and the plus sign represents an overall positive charge. Ions are very important to living organisms as they are essential for life‚ they play an important role within the cell allowing mechanisms within the living organisms such as respiration‚ to take
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Ecosystems: Change and Challenge The Structure of Ecosystems Ecosystem: a dynamic‚ stable system characterised by the interaction of plants and animals with each other and with the non-living components of the environment The components of an ecosystem are categorised as either biotic and abiotic Biotic means the living environment‚ components include: i). Vegetation (living and decomposing) ii). Mammals‚ insects‚ birds and microorganisms Biomass-the mass of material in the bodies
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DNA- is the material found in the nucleus that contains the genetic info. 4 billion codes in length Gene- a segment of DNA that controls a certain protein production. A gene is made up of hundreds to thousands of codes. Chromosomes- genetic material that is coiled up into structures during cell division. Importance of DNA- genes control the production of proteins..(look like‚ body function‚ body communications‚ and enzyme control) DNA screening- the process of testing individuals to determine
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