that determines how living organisms look or work. They also control the manufacture of proteins in a cell. There are about 35 000 genes found in almost every healthy cell. Scientists are constantly conducting experiments on genes. Genetic modification is one of such experiments. Genetic modification refers to the deliberate alteration of the genetic structure or DNA of an organism in order to give it new abilities and produce a desired effect. Organisms that are modified with DNA from another organism
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Name: _______________________ IB DP Biology: Ecology Test – Paper 1 40 Points 45 Minutes 1.Which phylum does the plant below belong to? A.AngiospermophytaB.BryophytaC.ConiferophytaD.Filicinophyta2.What is a community composed of? A.Habitats B.Populations C.Abiotic factors D.Biotic and abiotic factors 3.Which of the following is the best definition of a population? A.A group of individuals that can interbreed and produce fertile offspring B.The number of individuals of the same species
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these pollutants contain additional chemicals‚ which increase our exposure to potentially harmful chemicals. How Anyzone Gold helps: It’s for the whole family • Disposes harmful bacteria in meat and fish • Removes chemical residue‚ larva and pesticides from vegetables and fruits • Gets rid of unpleasant odor from food • Improves skin metabolism and reduces allergy • Removes washing detergent residues and bacteria from household items and utensils • Preserves freshness
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Synopsis – Grade 8 Science Chapter 1: Crop Production And Management Crop: Same kinds of plants cultivated on a large scale Types Kharif crops Rabi crops Season Sown in rainy season (June to September). grown during winter season (October to March) Examples soyabean‚ paddy‚ maize wheat‚ gram‚ pea Basic crop production practices Practices Preparation of soil Sowing Process Loosening and upturning of the soil. This process is known as tilling or ploughing. Placing
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Chapter 34 Vertebrates Overview: Half a Billion Years of Backbones * Vertebrates are named for vertebrae‚ the series of bones that make up the vertebral column or backbone. * There are about 52‚000 species of vertebrates‚ far fewer than the 1 million insect species on Earth. * Plant-eating dinosaurs‚ at 40‚000 kg‚ were the heaviest animals to walk on land. * The biggest animal that ever existed is the blue whale‚ at 100‚000 kg. * Humans and our closest relatives are
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Life in the deep ocean [pic] http://www.mcz.harvard.edu/Departments/Ichthyology/larval_fish_archive.html Investigate how organisms survive in an extreme environment Earth and space science: 2.4 AS91190 Credits: 4 Arnold Weiner Contents 1.0 Introduction 2.0 Ocean zones 2.1 The epipelagic zone 2.2 The mesopelagic zone 2.3 The bathypelagic zone 2.4 The abyssopelagic zone
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(which undergo four metamorphoses) and adults. (Adapted from University of Liverpool (n.D.) ) Equine parasitic nematodes spend most their lives inside a horse’s stomach or intestines. Once inside the horse’s body‚ whether ingested as an egg or larva‚ each worm has a different life cycle and migration pattern‚ but most are transmitted by the fecal-oral route. Worm burden in the individual host is dependent on the intake. Nematodes develop slowly so any resultant disease is slow in onset and chronic
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* Are made of animal cells * No cell walls * Eukaryotic. Lysosomes‚ centrioles. Flagella‚ cilia * Multicellular * Heterotrophic * Chemotrophic * They are either: 1. Invertebrates * Have no back bone 2. Vertebrates Things to classify Animals: 1. Feeding 2. Respiration 3. Internal Transport 4. Excretion 5. Response 6. Movement 7. Reproduction Phylum Porifera * The flagella move water into the sponge * Cells collect
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little equipment. They are also very small and it is easy to distinguish males vs females and sexually mature flies and virgins. At lastly‚ the flies have a very short two week life span. On days 2-7 of their life after they hatch they are in the larva stage. Then on days 7-11 the flies go through the pupa stage where the go into a cocoon. Then on days 11-14 they emerge fully developed as an adult (but females won’t be sexually mature until 8-10 hours after they emerge. Form the time of egg to
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AP Biology‚ Chapter 33 Invertebrates [by clade] SUMMARY INTRODUCTION PARAZOA Introduction Phylum Porifera: Sponges are sessile with porous bodies and choanocytes 1. Identify the parts of a sponge (including the spongocoel‚ porocyte‚ epidermis‚ choanocyte‚ mesohyl‚ amoebocyte‚ osculum‚ and spicule) and describe the function of each. a. Lifestyle: sessile‚ immobile filter feeders b. Water circulation i. Epidermis seals outside ii. Flagellated choanocytes lining
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