Study specimens A, B, C, E and F and answer questions 1(a) to 1(e).
(a) Name one branch of Biology D which involves the use ot specimens A, B, C, D, E and F. (b) State one function of each of Specimens A. B. C D E and F:
(c) Describe briefly how each of specimens B and D could be used.
(d) make a drawing, 10 cm to 12 cm long of specimen D and label fully.
(e) Name two organisms each associated with the use ot specimens D and F.
a) Branch of Biology which involves the use of specimens A, B, C, D, E, and F is Ecology.
(b) Function of specimens:
A /thermometer: is used to measure temperature or the hotness/coldness of an object,
B /rain gauge: is used to measure amount or quantity of rain/rainfall/precipitation,
C /meter rule: is used to measure distance/depth of water/length of an object,
D /sweep net: is used to catch or collect flying insects;
E /wind vane: is used to determine wind direction/direction of wind.
F/quadrat: is used for population studies/determine the population of small organisms/small plants/crawling insects.
(C) Description of the use of Specimens B and D: Specimen B (Rain gauge): - it is placed in an open area/without vegetation/not under a building;-On an elevated platform (at least 8cm above ground level) to avoid rain splashes or run off)
- After each rainfall, the amount of water collected in the measuring cylinder is noted and recorded; - over a period of time: - amount of rainfall is calculated using the formula:
\(\frac{Rainfall (cm)}{ Time/Period}\) = \(\frac{D^{2} \times h}{d^{2}}\).
(D= diameter of collecting cylinder); (d = diameter of funnel mouth); (h height of rain water in cylinder).
Specimen D (sweep net): the habitat is chosen; - the sweep net is held by the handle;-it is swung in the air to catch organisms or insects;-the number and types of insects caught are trapped in the container. -the trapped insects are counted and recorded.
(e) Organisms associated with the use of Specimens D(sweep net) and Specimen F quadrat Specimen.
D (Sweep net): Butterfly, grasshopper, dragonfly, praying mantis.
Specimen F (quadrat) Ant; millipede; beetle; garden snail; tridax; waterleaf or talinum; spear grass, grasses.
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