MODERN INTERNATIONAL SCHOOL BANGKOK 1 YR-10 A UNIT-15,16 FORMATIVE ASSESSMENT SUBJECT- BIOLOGY 1 DATE- 3/5/24, MM-30 There are stem cells in the epithelial tissue that forms the lining of the stomach. Explain why these stem cells are necessary. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. [2] [Total: 2] 2 Which statements about mitosis are correct? 1 Mitosis produces genetically identical cells. 2 Mitosis produces genetically different cells. 3 Mitosis produces gametes. 4 Mitosis produces body cells. A 1 and 3 B 1 and 4 C 3 and 4 D 2 and 3 [1] [Total: 1] 3 What is produced when a cell undergoes mitosis once? A four new cells which are different from each other and from their parent cell B four new cells which are identical to each other and to their parent cell C two new cells which are different from each other and from their parent cell D two new cells which are identical to each other and to their parent cell [1] [Total: 1] 4 One role of mitosis is to repair damaged tissues. State two other examples of when mitosis occurs. 1 ............................................................................................................................................... 2 ............................................................................................................................................... [2] 2 [Total: 2] 5 Mitosis and meiosis are types of nuclear division. The table shows some features of mitosis and meiosis. Place ticks (✓) in the boxes to show which features occur in which type of nuclear division. feature mitosis meiosis produces gametes produces genetically different cells produces genetically identical cells produces new cells during growth and repair to damaged tissues replaces cells used in asexual reproduction [4] [Total: 4] 3 6 The diagram shows some of the stages in the reproduction of the bacterium Escherichia coli. loop of DNA original bacterial cell bacterial cell expands to a critical length and a copy of DNA is synthesised daughter cells are formed daughter cells grow Complete the sentences about the cells in the diagram. The DNA is in the form of a double ............................................... . The DNA is copied so that the number of loops of DNA after cell division is ............................................... in each daughter cell. The daughter cells are genetically ............................................... to the original cell. [3] [Total: 3] 4 7 The diagram shows a section through a carpel shortly after pollination. Complete the sentences: Pollen grains are formed in anthers. During their formation the number of chromosomes in the nuclei is halved by the process of .............................................. . This means the male nucleus A in the pollen tube is described as a .............................................. nucleus. When nucleus A .............................................. with nucleus B, the chromosome number doubles to form a .............................................. nucleus. The name of this process is .............................................. . Then the .............................................. divides by the 5 process of .............................................. to form an embryo. [7] [Total: 7] 6 8 Complete the sentences about seeds. Use words from the list. Each word may be used once, more than once, or not at all. asexual light vitamins carbon dioxide mineral ions gravity oxygen hormones sexual water Plants produce seeds as a result of .............................................. reproduction. Seeds germinate if they have the correct conditions. These conditions include a suitable temperature and also .............................................. and .............................................. . The germinating seed produces a young root which grows downwards in response to .............................................. . The young root absorbs .............................................. and .............................................. from the soil as well as keeping the young plant in a stable 7 position. [6] [Total: 6] 9 Grass plants are wind-pollinated. The diagram shows a flower from a species of grass plant. Wheat has flowers similar to those in the diagram, but reproduces by self-pollination. Explain the consequences of self-pollination for a population of plants. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. [4] [Total: 4]
