QUESTIONS AND ANSWERS SECTION A: SIMILARITIES‚ DIFFERENCES‚ AND DEFINITIONS Gametes are mature haploid reproductive cells that unite to form a zygote that develops into a new individual. Gametes are also called sex cells. An egg or ovum is a haploid female reproductive cell or gamete whereas a sperm is a male haploid reproductive cell. A zygote is the initial cell that is formed as a result of the union of a male and a female gamete by means of sexual reproduction. The two haploid cells merge
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starts What is active transport? What is its significance to cell function? Cell cycle and cell cycle control What happens if the cell cycle loses its ability to control the cell cycle? Mitosis: What is the significance of the cell cycle process? Reading Quiz 5 opens 4:71-75; 81-87 4:75-81 How does mitosis in plants and animals differ? Reading Quiz 6 opens What is the structure and function of DNA? 5:89-96 How does DNA replication? 6:104-121 Finish DNA Transcription: How
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SBI4U Exam Review Topic 1 1. The table below shows the level of hemoglobin measured in two different groups of athletes. Hemoglobin / grams per 100 cm3 Number of athletes tested Standard deviation / grams per 100 cm3 Group A 12.6 200 0.8 Group B 11.9 220 3.2 Which of the following statements is correct? A. Results from group B are more accurate because more athletes were tested. B. Results from group B are more reliable because it has a higher standard deviation. C.
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CORE BIOLOGY PRACTICALS You will need to know these practicals as the exam board may ask you questions based on them. Below is a summary of each one. Name of practical and independent & dependent variables Effect of caffeine on Daphnia heart rate Independent: caffeine concentration Dependent: heart rate of Daphnia Measuring the content of Vitamin C in fruit juice Independent: fruit juice Dependent: volume of juice required to decolourise 1cm3 of DCPIP The effect of temperature on cell membranes
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The mitosis of the fertilized egg divides to form two cells‚ then divide again from two to four‚ then from four to eight in a binary sequence - 1‚ 2‚ 4‚ 8‚ 16‚ 32‚ etc. The identical structure as developed further creates the human body and all of the energy systems including the ones to create the Merkaba.   The division of a cell into eight in a sphere forms one tetrahedron upwards‚ and one tetrahedron downwards‚ which is the star tetrahedron. The movement of the mitosis creates first
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.................................................. 3 ...................................................................................................................................[3] (b) Plant cells divide by mitosis‚ not by binary fission. (i) State three roles of mitosis in plants. 1
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BIO- FINAL EXAM REVEW SHEET This is a comprehensive review of material from exams 1-3. Please study your class notes/powerpoint slides and read the chapters listed in your syllabus to study for all new material. What are the characteristics of living organisms? Acquire and use energy Made up of other cells Process information Can replicate itself (can reproduce) Population evolves (they evolve) What are the characteristics of cells? Contain genetic information Can duplicate themselves
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colleagues in 1960 (Matthews‚ 1999). It affects approximately 1 in 12‚000 births and is the least common of the trisomy syndromes‚ after trisomy 18 and trisomy 21 (Down syndrome). An abnormality of the chromosome occurs when mitosis or meiosis does not happen correctly. During mitosis‚ when the cells are dividing‚ chromosomes are either lost or gained. The chromosomes do not separate evenly. When the distribution of chromosomes during cell division occurs after the egg is fertilized by the sperm‚ mosaicism
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must complete a certain cell cycle before it can carry out another. The most interesting realization is that M phase and G2 fusion caused G2 to enter mitosis. When unfertilised Xenopus oocytes were injected into interphase oocytes there were similar results obtained. This meant that in the cytoplasm of dividing cells a factor controlled entry to mitosis and the activity was called the M-phase controlling factor. 4. The G1/S control point is determined by three cyclindependent kinases (Cdk2‚ Cdk4
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Unit 1 Diversity 1. List the 6 kingdoms for classifying living things. 2. List the levels of organisation from kingdom to species. 3. What is binomial nomenclature? 4. Who is Carl Linnaeus? 5. What is a dichotomous key? 6. Draw and label the lifecycle of a DNA virus. 7. Distinguish between DNA and RNA viruses. 8. Compare eukaryotic cells and prokaryotic cells. 9. Define coccus‚ bacillus‚ streptococcus‚ and spirillum? 10. What are 3 examples of helpful bacteria? 11. What do bacteria need
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