What is the name of the process that enables organisms to maintain a relatively stableinternal environment? Osmosis Correct Incorrect Osmosis Adaptation Correct Incorrect Adaptation Homeostasis Correct Incorrect Homeostasis Active transport Correct Incorrect Active transport Which of the following body systems is involved in detecting and responding toenvironmental changes? Circulatory Correct Incorrect Circulatory Digestive Correct Incorrect Digestive Excretory Correct Incorrect Excretory Nervous Correct Incorrect Nervous Which scientist contributed to our understanding of the immune response? Robert Koch Correct Incorrect Robert Koch Louis Pasteur Correct Incorrect Louis Pasteur Maurice Wilkins Correct Incorrect Maurice Wilkins Frank Macfarlane Burnet Correct Incorrect Frank Macfarlane Burnet What is the role of lymphocytesin the body? They fight infection Correct Incorrect They fight infection They initiate blood clotting Correct Incorrect They initiate blood clotting They transport oxygen around the body Correct Incorrect They transport oxygen around the body They transport carbon dioxide around the body Correct Incorrect They transport carbon dioxide around the body Four vertebrate forelimbs are shown. In which area of study do these forelimbs support the theory of evolution? Homology vertebrates, © Βοлков Владислав Петрович / NSW Education Standards Authority Biogeography Correct Incorrect Biogeography Comparative anatomy Correct Incorrect Comparative anatomy Comparative embryology Correct Incorrect Comparative embryology Comparative embryology Correct Incorrect Comparative embryology What name is given to the process whereby a white blood cell engulfs a microorganism? Infection Correct Incorrect Infection Inflammation Correct Incorrect Inflammation Phagocytosis Correct Incorrect Phagocytosis Vaccination Correct Incorrect Vaccination Which waste product does renal dialysis remove? Urea Correct Incorrect Urea Urine Correct Incorrect Urine Lipids Correct Incorrect Lipids Vitamins Correct Incorrect Vitamins What is the probability of producing a tall pea plant when a heterozygous tall pea plantis crossed with a homozygous short pea plant? 0% Correct Incorrect 0% 50% Correct Incorrect 50% 75% Correct Incorrect 75% 100% Correct Incorrect 100% Which statement correctly describes fungi and protozoans? Fungi and protozoans are unicellular Correct Incorrect Fungi and protozoans are unicellular Fungi and protozoans have chloroplasts Correct Incorrect Fungi and protozoans have chloroplasts Fungi have a cell wall and protozoansdo not Correct Incorrect Fungi have a cell wall and protozoansdo not Fungi are procaryotic and protozoans are eucaryotic Correct Incorrect Fungi are procaryotic and protozoans are eucaryotic Which feature of DNA was discovered as a result of Rosalind Franklin’s work? Double helix shape Correct Incorrect Double helix shape Long stranded molecule Correct Incorrect Long stranded molecule Sugar-phosphate backbone Correct Incorrect Sugar-phosphate backbone Complementary nucleotides Correct Incorrect Complementary nucleotides Normal microflora are considered to be pathogenic when they... Increase in size Correct Incorrect Increase in size Are resistant to antibiotics Correct Incorrect Are resistant to antibiotics Cause symptoms in a person Correct Incorrect Cause symptoms in a person Are transferredto another person Correct Incorrect Are transferredto another person Which of the following best describes metabolism? The optimum activity of an organism Correct Incorrect The optimum activity of an organism All of the enzymes in a living organism Correct Incorrect All of the enzymes in a living organism An enzyme-catalysed reaction in an organism Correct Incorrect An enzyme-catalysed reaction in an organism All the chemical reactions inside cells of an organism Correct Incorrect All the chemical reactions inside cells of an organism Antibodies are moleculesreleased by... Memory B cells Correct Incorrect Memory B cells Memory T cells Correct Incorrect Memory T cells Specialised B cells Correct Incorrect Specialised B cells Specialised T cells Correct Incorrect Specialised T cells The diagram shows some chromosomes during some stages of meiosis. When does the segregation of homologous chromosomes occur? NSW Education Standards Authority Before stage 1 Correct Incorrect Before stage 1 Between stages 1 and 2 Correct Incorrect Between stages 1 and 2 Between stages 2and 3 Correct Incorrect Between stages 2and 3 Between stages 1 and 2 and again between stages 2 and 3 Correct Incorrect Between stages 1 and 2 and again between stages 2 and 3 Capillaries have thin walls that help them perform their main function. The best explanation for this is that... Capillaries are the smallest vessels in the body Correct Incorrect Capillaries are the smallest vessels in the body Thin walls are an adaptation that help diffusion Correct Incorrect Thin walls are an adaptation that help diffusion Blood flow in capillaries is under very low pressure Correct Incorrect Blood flow in capillaries is under very low pressure Thin walls maximise the surface area available for gas exchange Correct Incorrect Thin walls maximise the surface area available for gas exchange The effect of the melanoma vaccine is to stimulate... T cells which produce antibodies Correct Incorrect T cells which produce antibodies Cytotoxic T cells which activateB cells Correct Incorrect Cytotoxic T cells which activateB cells Cell division to produce more lymphocytes Correct Incorrect Cell division to produce more lymphocytes Production of B cells which destroy melanoma cells Correct Incorrect Production of B cells which destroy melanoma cells How does the production of a new transgenic species have the potential to alter the pathof evolution? The creation of new genes increases biodiversity Correct Incorrect The creation of new genes increases biodiversity The removal of genes from a species decreases biodiversity Correct Incorrect The removal of genes from a species decreases biodiversity The transfer of genes within a species increases biodiversity Correct Incorrect The transfer of genes within a species increases biodiversity The transfer of genes between two species increases biodiversity Correct Incorrect The transfer of genes between two species increases biodiversity Which of the following does NOT play a role in maintaining the health of an organism? Mitosis Correct Incorrect Mitosis Cell death Correct Incorrect Cell death Gene expression Correct Incorrect Gene expression Sexual reproduction Correct Incorrect Sexual reproduction What are alternative forms of genes called? Alleles Correct Incorrect Alleles Autosomes Correct Incorrect Autosomes Chromatids Correct Incorrect Chromatids Chromosomes Correct Incorrect Chromosomes Which adaptation would decrease water loss from a plant in a region with low rainfall? Broad leaves Correct Incorrect Broad leaves Surface roots Correct Incorrect Surface roots Sunken stomates Correct Incorrect Sunken stomates Loosely packed epidermal cells Correct Incorrect Loosely packed epidermal cells Questions were taken from previous HSC Biology exams, available on the NSW Education Standards Authority website.