Life on Earth. 1. Analysis of the oldest sedimentary rocks provides evidence for the origin of life. * Identify the relationship between the conditions on early Earth and the origin of organic molecules. * Scientists estimate that the universe is 10-20 billion years old and arose as a big bang‚ which is still expanding the universe. * The early Earth was very different from the Earth today and no oxygen was present. This means that there was no ozone layer exposing the Earth’s surface
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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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SIGNIFICANCE OF THE STUDY Lagundi is a shrub that can be easily found and grown in the Philippines. It is said to be and effective and proven herbal medicine that has a reparative value. This plant is often used to treat clods‚ flu‚ asthma‚ bronchitis and pharyngitis. Most parts of the lagundi plant have medicinal value. This experiment will be able to lessen the use of chemicals in the body with curing all kinds of sicknesses in a natural way. In our time now‚ the common sicknesses we experience
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Funguslike Protists * heterotrophs‚ decomposers * called slime molds and water molds Dog Vomit Slime Mold Mushroom Plantlike Protists: Red‚ Brown‚ Green Algae Green Algae: Phylum Chlorophyta Unicellular green algae‚ Colonial (volvox)‚ Multicellular (ulva‚ sea lettuce) Spirogyra live in water‚ multicellular named after a spiral shaped chloroplast autotrophic Diatoms (Plantlike Protist) produce thin cell walls of silicon‚ main component
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Title: Cell Structure І Objectives: 1. Prepare specimens for staining. 2. Identify unique and standard structures of the microscopic world. 3. Identify and use different stains for the different types of organelles. Results: a) Epidermal cells of plants: Upper surface or Rheo discolours leaf Low power: 40X Upper surface or Rheo discolours leaf Low power: 40X Upper surface or Rheo discolours leaf High power: 100X Upper surface or Rheo discolours
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8 In an osmosis experiment‚ four potato strips‚ each 5 cm in length‚ were left in salt solutions of different concentrations. The table shows the lengths of the strips after 30 minutes. Which salt solution was the most concentrated? 1 2 3 4 length of strips after salt solution 30 minutes A 4.5 cm B 4.8 cm C 5.0 cm D 5.3 cm Q) Use this diagram‚ which shows a cross-section through a leaf‚ to answer questions 14 and 15. 14 Which cell type absorbs the most carbon dioxide during the
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3.2 SEM analysis Fig. 3(a-f) shows the SEM micrographs of all the samples. It can be observed that all the particles are agglomerated in some irregular shapes‚ have no clear boundaries and are loosely packed. Moreover‚ the samples exhibit inhomogeneous grain size distribution [20]. Micrographs also confirm the decrease in grain size with substitution of Pr. The electrical and magnetic properties of ferrites are largely affected by the grain size. It is evident from micrographs that the average grain
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Unit 1: fundamentals of science. Title An investigation of an onion cell using a light microscope. Aim: The aim of this investigation is to identify the cells within an onion skin using a light microscope. An onion cell is a plant cell which through the light microscope‚ it should outline the cell wall‚ cell membrane and the nucleus. Introduction: Plant cells have a cell wall and cell membrane which animal cells do not have. The cell wall provides support and is relatively rigid‚ which consists
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Eukaryotic cells are present in organisms that contain cilia and flagella - organelles that function primarily for motility and also as a sensory reception. Both secondary cilia (motile) and flagella contain quite similar internal structures; while primary cilia (nonmotile) - found more commonly than secondary in common cells‚ have a deficiency of two singlet microtubules that together account for the cell’s lack of movement (Adams 2010). Mutation of cilia with such characteristics may lead to ciliary
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What are the common and scientific names of your organism? The organism I have chosen to explore is commonly known as the Chinese giant salamander and scientifically as Andrias davidianus. It is also noted that species is sometimes assigned to the Cryptobranchium genus (Gang et al.‚ 2004). List the taxonomy of your organism- what are the Phylum‚ class‚ order‚ and family of your organism? Domain: Eukarya Kingdom: Animalia Phylum: Chordata Class: Amphibia Order: Caudata
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