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By contrast elephants hear between 5 – 12 000 Hz as they use infrasound for communication. Once a microbe has been identified as the cause of a disease, the antigens from its’ surface can be isolated and used in a vaccination. Question 22 HSC XII ECONOMICS 9Th March 2019 Organism X maintains internal salt concentration regardless of the external environment. In order to research diseases, the genes that are responsible for them had to be identified. Reproduction. shipping ports, airports, border crossings). Each codon corresponds to an amino acid. The committees do this to ensure that the questions will … Each question has been mapped to show how the sample question relates to syllabus outcomes and content. However, Lynch syndrome does not cause cancer in 100% of individuals that are carrying the allele so some individuals in the family that do not have cancer may still be carrying the allele. Then in Anaphase I each chromosome in the pair moves (randomly) to opposite ends of the cell. Sample answers and marking guidelines for Sections I, II, III and IV are provided. HSC Biology 1st Paper Suggestion 2018 is the most important suggestion for the students of HSC. These three measures are from arterial blood gas analysis. Air is moved out from the lungs to the upper respiratory tract by the contraction of abdominal muscles and relaxing of the diaphragm. HSC All Board All Subjects Board Question 2018. The egg (32 chromosomes) is stimulated to begin cell division to form an embryo. These models only exist due to the accumulation of knowledge about genes and gene technologies. The condition is not sex-linked recessive as an unaffected father (individual 1) has produced an affected daughter. This increase is due to biological developments in identification, treatment and prevention of disease during this time. A diploid somatic cell with 32 chromosomes is removed from the animal to be cloned. We have included the answers to the two most popular option topics: Please enjoy our solutions from the science team, below. Sample answers or marking guidelines included with most papers. Maharashtra State Board Class 12 maths 2018 question paper with solutions are available on this page, by BYJU’S, in downloadable pdf format and also in the text for the students to prepare well for the MSBSHSE exams. This is particularly evident in new-borns, where the life expectancy increased from around 47 years to 73 years. In many countries water filtration systems were introduced to provide clean drinking water to the public via methods such as filtration and chlorination. Sunken stomata reduce that rate that water is lost from the leaf by creating a humid environment just outside to the stomate. NESA 2018 HSC Biology Marking Guidelines: Sample answer: The model represents homologous pairs of chromosomes as being the same size and identifies the paternal or maternal origin with different shading. The nucleus is removed from the egg, it is now enucleated (0 chromosomes). During prophase I chromatin condenses to form chromosomes consisting of two identical chromatids. Terrestrial mammals convert ammonia into urea in the liver.
2020 2018 hsc biology sample answers