CELLS All living things are made of cells‚ and cells are the smallest units that can be alive. Life on Earth is classified into five kingdoms‚ and they each have their own characteristic kind of cell. However the biggest division is between the cells of the prokaryote kingdom (the bacteria) and those of the other four kingdoms (animals‚ plants‚ fungi and protoctista)‚ which are all eukaryotic cells. Prokaryotic cells are smaller and simpler than eukaryotic cells‚ and do not have a nucleus. Prokaryote
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particles that were left undigested are then removed from the cell at a specific point inside of the cell called the cytoproct (Shefferly‚ 2010). Considering this process that the protist undergoes‚
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ANSWERS Cambridge IGCSE® Biology Practice Book Answers 1 Characteristics of living things 1 Characteristic respiration an increase in size‚ mass and complexity of an organism excretion producing offspring‚ which prevents extinction of the species sensitivity this involves feeding – obtaining nutrients for growth‚ energy and maintaining health reproduction in response to changes‚ e.g. presence of a predator‚ to find food or a mate growth the ability
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POEM ANALYSIS In the poem “Monologue for an Onion” by Suji Kwock Kim‚ the onion metaphor is the centerpiece of the poem. The onion represents the poet‚ and the person she addresses (the reader assumes) is her lover. The onion metaphor is used to convey the message to this anonymous lover that she is by nature heartless and that he should stop trying to unearth a hidden core. The author is trying to dissuade her lover from further fruitless digging which only seems to cause him distress. The speaker
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cutting/crushing) Vertical (open wide to capture & kill prey) Not horizontal (dislocation) Jaw muscles = well developed/powerful (grip firmly on prey/crush bones) Cheek teeth Interlock. (W into M) Worn down = sharp enamel ridges (efficiency). Open roots (grinding) Jaw movement Other Circular grinding. Horizontal plane Diastema = gap between front & side teeth. Tongue moves cut grass to grinding surfaces (cheek teeth) Ruminants Produce most protein eaten by humans eg. Cows/sheep Mutualism/Symbiosis
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animal) Animals that have definite shape and symmetry and have organs All bilateria animals are triploblasty Can be protostomes or deuterostomes (depends on blastopore development) Only Cnidaria (sponges) and Ctenophora are diploblasty 32.4 The roots of the Animal Tree of Life 32.4.1 Metazoans appear to have evolved from colonial protists Evidence: Multicellular Colonial flagellated hypothesis 32.4.2 Molecular analysis may explain the Cambrian explosion Result of Cambrian explosion Emergence
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Part 2: Effects of Environment on Mitosis. Experimental Hypothesis: If we put onion root tips in IAA solution then the rate of Mitosis will increase. Null Hypothesis: There will be no difference Part 1- Post Lab Question If a cell contains a set of duplicated chromosomes‚ does it contain any more genetic information than the cell before the chromosomes were duplicated? No‚ because if it is duplicated‚ it would have the same number of chromosomes unless there was a
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Introductory Biology‚ Biology 1407 MWF 11:00. TAMU-CC. Working version of the 1st lecture exam‚ as of 19 January 2014 1. Science can prove hypotheses to be false because: 2. In a population: phenotype Average number of offspring per individual Very small nose 5.5 Small nose 6.0 Medium size nose 10.7 Large nose 20.7 What is the relative fitness of organisms with small noses? 3. In the above population‚ assuming that at one time the population followed a normal curve
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BIOLOGY Paper 2 Core 1 hour 15 minutes No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write in dark blue or black pen. You may use a pencil for any diagrams or graphs. Do not use staples‚ paper clips‚ highlighters‚ glue or correction fluid. Answer all questions. 1 2 3 4 5 6 7 8 9 Total This document consists of 14 printed pages and 2 blank pages. IB10 11_0610_21/4RP © UCLES 2010 [Turn over 2 1 (a) Fig. 1.1 shows a mammal. For Examiner’s
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Compound Microscope Parts A high power or compound microscope achieves higher levels of magnification than a stereo or low power microscope. It is used to view smaller specimens such as cell structures which cannot be seen at lower levels of magnification. Essentially‚ a compound microscope consists of structural and optical components. However‚ within these two basic systems‚ there are some essential components that every microscopist should know and understand. These key microscope parts are illustrated
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