Dichotomous key
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Classification systems are important because they organize items into groups based on common characteristics. This makes it easier to find and identify things. For example, music stores organize their CDs by music type and artist. Shoe stores also classify shoes into groups like boys, girls, men and women to make shopping easier. Scientists use classification to group organisms based on shared traits. A dichotomous key is a classification tool that uses yes/no questions to identify organisms by separating them into increasingly specific groups. The document provides examples of how a dichotomous key can be used to classify insects and animals into groups based on characteristics like number of legs, wings, and tails.
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The document describes the characteristics of different groups of vertebrates including mammals, birds, fish, reptiles and amphibians. It notes that mammals give birth to babies and feed them milk from their lungs. Birds have wings, feathers, lay eggs and have lungs. It then provides three puzzles asking to identify an animal from its description and which group it belongs to. The puzzles are identified as whales belonging to the mammal group, penguins belonging to the bird group, and bats belonging to the mammal group.Vertebrates classification
Vertebrates classificationsafa-medaney
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The document describes five categories of animals - mammals, birds, amphibians, fish, and reptiles. It provides 3 key distinguishing characteristics for each category:
Mammals: give birth to live young, feed babies milk, have fur and lungs. Birds: have feathers and wings, have lungs, lay eggs. Amphibians: lay eggs in water, have moist skin, young live in water as adults live on land. Fish: have scales, gills to breathe, lay eggs and live entirely in water. Reptiles: have scales and dry skin, lungs, lay leathery eggs.Vertebrates and invertebrates
Vertebrates and invertebratessafa-medaney
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Animals are grouped into two categories: vertebrates, which have a vertebral column or backbone, and include animals like camels, crocodiles, ducks, elephants, giraffes, frogs, lions, rats, snakes, and turtles. The second group is invertebrates, which do not have a backbone and includes animals such as bees, ants, cockroaches, house flies, prawns, jellyfish, crabs, butterflies, octopuses, snails, worms, and starfish.Classification of living things
Classification of living thingssafa-medaney
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This document discusses classification of living things. It explains that classification is the grouping of organisms according to similar characteristics. The modern 7-level classification system was developed by Linnaeus and consists of kingdom, phylum, class, order, family, genus, and species, with species being the smallest group. An example of human classification using this system is provided.The solar system
The solar systemsafa-medaney
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The document discusses the solar system and compares Earth to other objects within it. It explains that the solar system consists of the Sun and objects that orbit around it, including planets and moons. The planets are divided into rocky terrestrial planets like Earth and gas giants like Jupiter. Earth is the third planet from the Sun and is unique for hosting life and having 70% of its surface covered in water. The document provides details about each of the eight planets in our solar system, including their order from the Sun and distinguishing characteristics.Recently uploaded (20)
Leafcurl viral disease presentation.pptx
Leafcurl viral disease presentation.pptxMir Ali M
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This ppt shows about viral disease in plants and vegetables.It shows different species of virus effect on plants along their vectors which carries those tiny microbes.History of atomic layer deposition (ALD) in a nutshell
History of atomic layer deposition (ALD) in a nutshellRiikka Puurunen
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Lecture slides presented at Aalto University course CHEM-E5175 Materials engineering by thin films (by Prof. Ville Miikkulainen), in a visiting lecture Jan 28, 2025
Contents:
1 Invention of Atomic Layer Epitaxy 1974
2 Microchemistry Ltd and spread of ALE/ALD
3 Independent invention, Molecular Layering 1960s -->
4 Connecting the two independent development branches of ALD
5 Take-home message
(Extra materials on fundamentals of ALD, assumed as background knowledge)
際際滷Share: /slideshow/history-of-atomic-layer-deposition-ald-in-a-nutshell/275984811
Youtube: https://youtu.be/FBLThDjRff0 ABA_in_plant_abiotic_stress_mitigation1.ppt
ABA_in_plant_abiotic_stress_mitigation1.pptlaxmichoudhary77657
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際際滷 describe the role of ABA in plant abiotic stress mitigation. 際際滷 include role of ABA in cold stress, drought stress and salt stress mitigation along with role of ABA in stomatal regulation. 
Propagation of electromagnetic waves in free space.pptx
Propagation of electromagnetic waves in free space.pptxkanmanivarsha
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The material discusses about electromagnetic wave propagation in free space and discusses about orientation of E and H vectorsDigestive System - Digestion of carbohydrates, proteins and lipids.ppt
Digestive System - Digestion of carbohydrates, proteins and lipids.pptJamakala Obaiah
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Useful to students(Journal Club) - Sci-fate Characterizes the Dynamics of Gene Expression in Si...
(Journal Club) - Sci-fate Characterizes the Dynamics of Gene Expression in Si...David Podorefsky, PhD
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Journal Club (4/27/20)
Sci-fate Characterizes the Dynamics of Gene Expression in Single Cellsvibration-rotation spectra of a diatomic molecule.pptx
vibration-rotation spectra of a diatomic molecule.pptxkanmanivarsha
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The material discusses about the energy levels in a molecule which have vibrational and rotational motion.Seminario- biologia molecular. Diapositivas
Seminario- biologia molecular. DiapositivasIsabelaRestrepo10
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Seminario Biolog鱈a Molecular
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Isabela Sep炭lveda Restrepo Respiration & Gas Exchange | Cambridge IGCSE Biology
Respiration & Gas Exchange | Cambridge IGCSE BiologyBlessing Ndazie
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This IGCSE Biology presentation explains respiration and gas exchange, covering the differences between aerobic and anaerobic respiration, the structure of the respiratory system, gas exchange in the lungs, and the role of diffusion. Learn about the effects of exercise on breathing, how smoking affects the lungs, and how respiration provides energy for cells. A perfect study resource for Cambridge IGCSE students preparing for exams!The Sense Organs: Structure and Function of the Eye and Skin | IGCSE Biology
The Sense Organs: Structure and Function of the Eye and Skin | IGCSE BiologyBlessing Ndazie
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This detailed presentation covers the structure and function of the sense organs, focusing on the eye and skin as part of the Cambridge IGCSE Biology syllabus. Learn about the anatomy of the eye, how vision works, adaptations for focusing, and common eye defects. Explore the role of the skin in temperature regulation, protection, and sensory reception. Perfect for students preparing for exams!
ARepeatingFastRadioBurstSourceinaLow-luminosityDwarfGalaxy
ARepeatingFastRadioBurstSourceinaLow-luminosityDwarfGalaxyS辿rgio Sacani
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Wepresent the localizationandhostgalaxyofFRB20190208A, arepeatingsourceof fast radiobursts (FRBs) discoveredusingCHIME/FRB.Aspartof thePinpointingREpeatingChImeSourceswithEVNdishesrepeater localizationprogramon theEuropeanVLBINetwork (EVN),wemonitoredFRB20190208Afor 65.6hr at 1.4GHzanddetectedasingleburst,whichledtoitsverylongbaselineinterferometrylocalizationwith260mas uncertainty(2).Follow-upopticalobservationswiththeMMTObservatory(i25.7mag(AB))foundnovisible hostattheFRBposition.SubsequentdeeperobservationswiththeGranTelescopioCanarias,however,revealedan extremelyfaintgalaxy(r=27.32賊0.16mag),verylikely(99.95%)associatedwithFRB20190208A.Giventhe dispersionmeasureoftheFRB(580pccm3),eventhemostconservativeredshiftestimate( ~ z 0.83 max )implies TheAstrophysicalJournalLetters,977:L4(17pp),2024December10 https://doi.org/10.3847/2041-8213/ad8ce1 息2024.TheAuthor(s).PublishedbytheAmericanAstronomicalSociety. 30BantingFellow. 31McGillSpaceInstituteFellow. 32 FRQNTPostdoctoralFellow. Originalcontent fromthisworkmaybeusedunder theterms of theCreativeCommonsAttribution4.0licence.Anyfurther distributionofthisworkmustmaintainattributiontotheauthor(s)andthetitle of thework, journalcitationandDOI. 1The Astrophysical Journal Letters, 977:L4 (17pp), 2024 December 10 Hewitt et al. that this is the lowest-luminosity FRB host to date (108 Le), even less luminous than the dwarf host of FRB20121102A. We investigate how localization precision and the depth of optical imaging affect host association and discuss the implications of such a low-luminosity dwarf galaxy. Unlike the other repeaters with low-luminosity hosts, FRB 20190208A has a modest Faraday rotation measure of a few tens of rad m2, and EVN plus Very Large Array observations reveal no associated compact persistent radio source. We also monitored FRB20190208A for 40.4hr over 2yr as part of the Extragalactic Coherent Light from Astrophysical Transients repeating FRB monitoring campaign on the Nan巽ay Radio Telescope and detected one burst. Our results demonstrate that, in some cases, the robust association of an FRB with a host galaxy will require both high localization precision and deep optical follow-up. Unified Astronomy Thesaurus concepts: Radio bursts (1339); Radio transient sources (2008); Very long baseline interferometry (1769); Dwarf galaxies (416)
first law of thermodynamics class 12(chemistry) final.pdf
first law of thermodynamics class 12(chemistry) final.pdfismitguragain527
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this is best note of thermodynamics chemsitry
(Journal Club) - Transgenic mice for in vivo epigenome editing with CRISPR-ba...
(Journal Club) - Transgenic mice for in vivo epigenome editing with CRISPR-ba...David Podorefsky, PhD
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Journal Club (9/21/21)
Transgenic mice for in vivo epigenome editing with CRISPR-based systems(Journal Club) - AmpliconReconstructor integrates NGS and optical mapping to ...
(Journal Club) - AmpliconReconstructor integrates NGS and optical mapping to ...David Podorefsky, PhD
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Journal Club (12/15/20)
AmpliconReconstructor integrates NGS and optical mapping to resolve the complex structure of focal amplificationsScience project class 10 Covid-19 Tuberculosis
Science project class 10 Covid-19 TuberculosisVEENAKSHI PATHAK
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Coronaviruses are a large family of
Viruses that are common
Throughout the world and can cause
Respiratory illness in people and
Animals.
The Solar Systems passage through the Radcliffe wave during the middle Miocene
The Solar Systems passage through the Radcliffe wave during the middle MioceneS辿rgio Sacani
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As the Solar System orbits the Milky Way, it encounters various Galactic environments, including dense regions of the
interstellar medium (ISM). These encounters can compress the heliosphere, exposing parts of the Solar System to the ISM, while also
increasing the influx of interstellar dust into the Solar System and Earths atmosphere. The discovery of new Galactic structures, such
as the Radcliffe wave, raises the question of whether the Sun has encountered any of them.
Aims. The present study investigates the potential passage of the Solar System through the Radcliffe wave gas structure over the past
30 million years (Myr).
Methods. We used a sample of 56 high-quality, young (30 Myr) open clusters associated with a region of interest of the Radcliffe
wave to trace its motion back and investigate a potential crossing with the Solar Systems past orbit.
Results. We find that the Solar Systems trajectory intersected the Radcliffe wave in the Orion region. We have constrained the timing
of this event to between 18.2 and 11.5 Myr ago, with the closest approach occurring between 14.8 and 12.4 Myr ago. Notably, this
period coincides with the Middle Miocene climate transition on Earth, providing an interdisciplinary link with paleoclimatology. The
potential impact of the crossing of the Radcliffe wave on the climate on Earth is estimated. This crossing could also lead to anomalies
in radionuclide abundances, which is an important research topic in the field of geology and nuclear astrophysics.Excretion in Humans | Cambridge IGCSE Biology
Excretion in Humans | Cambridge IGCSE BiologyBlessing Ndazie
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This IGCSE Biology presentation covers excretion in humans, explaining the removal of metabolic wastes such as carbon dioxide, urea, and excess salts. Learn about the structure and function of the kidneys, the role of the liver in excretion, ultrafiltration, selective reabsorption, and the importance of homeostasis. Includes diagrams and explanations to help Cambridge IGCSE students prepare effectively for exams!(Journal Club) - Sci-fate Characterizes the Dynamics of Gene Expression in Si...
(Journal Club) - Sci-fate Characterizes the Dynamics of Gene Expression in Si...David Podorefsky, PhD
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(Journal Club) - Transgenic mice for in vivo epigenome editing with CRISPR-ba...
(Journal Club) - Transgenic mice for in vivo epigenome editing with CRISPR-ba...David Podorefsky, PhD
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(Journal Club) - AmpliconReconstructor integrates NGS and optical mapping to ...
(Journal Club) - AmpliconReconstructor integrates NGS and optical mapping to ...David Podorefsky, PhD
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Dichotomous key
- 1. Essential Question: What is classifying? VOCABULARY: Classification Dichotomous Key
- 2. Objectives: 1. You will be able to explain why classification systems are important. 2. You will be able to demonstrate your understanding with a dichotomous key.
- 3. How many different types of music are there? Rap, classic Country, heavy metal Rock, dance Hip hop, childrens
- 4. Could you imagine shopping at a music store which did not separate their CDs by type? Or artist But just left them in a pile!
- 5. IMAGINE: Shopping at a shoe store where boys, girls, men, womens and kids shoes were all mixed together? Would it work? Would you go back? How are shoe stores typically classified?
- 6. Why do Scientists Classify? To make things easier To groups things
- 7. Classification: 1. organization into groups or categories. 2. Categorization of a population by common characteristics which the population has or does not have. 3. Make sure characteristics are observations and not inferences !
- 8. INSECTS
- 9. INSECTS Those with wings Those without wings Two Group System: Dichotomous Key
- 10. INSECTS Those with wings Those without wings Two Group System: Dichotomous Key
- 11. Animals
- 12. Animals Animals WITH 4 legs Animals NOT 4 legs
- 13. Animals Animals WITH 4 legs Animals NOT 4 legs
- 14. Animals Animals with 4 legs Animals NOT with 4 legs Has a Tail No Tail Has wings No wings Dichotomous Key 2 Groups 2 Levels
- 15. Animals Animals with 4 legs Animals with 2 legs Has a Tail No Tail Has wings No wings Dichotomous Key 2 Groups 2 Levels