Identify and describe the uses of common laboratory instruments A, B, C, D, and E.

Here are the answers to the questions: Question 2: a) Identify the instruments labelled A, B, C, D, and E. • A: Thermometer • B: Measuring cylinder • C: Pipette • D: Hydrometer • E: Conical flask A: Thermometer, B: Measuring cylinder, C: Pipette, D: Hydrometer, E: Conical flask b) State one (1) use of each of the following instruments A, B, C, D and E. • A (Thermometer): Used to measure temperature. • B (Measuring cylinder): Used to measure approximate volumes of liquids. • C (Pipette): Used to measure and transfer precise volumes of liquids. • D (Hydrometer): Used to measure the relative density (or specific gravity) of liquids. • E (Conical flask): Used to hold and mix liquids, often in titrations. A: Measures temperature, B: Measures approximate volumes, C: Measures precise volumes, D: Measures relative density, E: Holds and mixes liquids c) Describe how instrument C is used. Instrument C, a pipette, is used to accurately measure and transfer a specific volume of liquid. Step 1: A pipette filler (or bulb) is attached to the top of the pipette. Step 2: The tip of the pipette is immersed in the liquid, and the liquid is drawn up past the calibration mark using the filler. Step 3: The filler is removed, and a finger is quickly placed over the top opening to control the liquid flow. Step 4: The liquid level is adjusted until the bottom of the meniscus is exactly on the calibration mark. Step 5: The measured volume of liquid is then transferred to the desired container by releasing the finger. Pipette used to accurately measure and transfer liquid by drawing liquid to mark with filler, then releasing. Question 3: a) Name the parts labelled I, II, III, IV, V, VI and VII. • I: Pedicel • II: Sepal • III: Ovary • IV: Stigma • V: Anther • VI: Filament • VII: Petal I: Pedicel, II: Sepal, III: Ovary, IV: Stigma, V: Anther, VI: Filament, VII: Petal b) Give one (1) function each of the parts labelled I, II, III, IV, V, VI and VII. • I (Pedicel): Supports the flower. • II (Sepal): Protects the flower bud. • III (Ovary): Contains ovules and develops into fruit after fertilization. • IV (Stigma): Receives pollen during pollination. • V (Anther): Produces and contains pollen grains. • VI (Filament): Supports the anther. • VII (Petal): Attracts pollinators (e.g., insects) with its color and scent. I: Supports flower, II: Protects bud, III: Contains ovules, IV: Receives pollen, V: Produces pollen, VI: Supports anther, VII: Attracts pollinators c) State one (1) type by which the flower is pollinated. The flower is likely pollinated by insects. Insect pollination d) Describe two (2) advantages to the type of pollination stated in (c) above. Two advantages of insect pollination are: • Efficiency: Insects can directly transfer pollen between flowers, making the process more efficient and increasing the chances of successful fertilization compared to random methods like wind pollination. • Reduced pollen wastage: Less pollen needs to be produced and is wasted because it is specifically carried by the insect to another flower, rather than being dispersed broadly. More efficient pollen transfer; Less pollen wastage Last free one today — make it count tomorrow, or type /upgrade for unlimited.