CIE Biology Paper-5: Specimen Questions 27 - 29 of 62

Question number: 27

Essay Question▾

Describe in Detail

Figure shows two worms write their phyla name and characteristics.

Figure shows two worms

Figure shows two worms

Figure shows two worms identify their phylum

Explanation

First figure is related to Phylum Annelid Earthworms

Characteristics-

  • true coelom, though partitioned by segmentation
  • Digestive tract, blood vessels, nerve cords run the length of the animal
  • Heart and blood vessels present earthworms respire through skin - closed system.
  • Brain like ganglia are present

Second figure is related to Phylum Platyhelminthes - Flat worms

Characteristics-

  • Bilateral symmetry
  • Flattened dorso-ventrally (thin from front to back).
  • have mesoderm, and are generally much more complicated than cnidarians, but still fairly primitive for animals
  • gut (if present) only has a single opening
  • No body cavity

Question number: 28

Essay Question▾

Describe in Detail

You are provided with a fruit, which have been cut in half longitudinally through the middle. Make a large labelled drawing of the cut surfaces.

Image shows a fruit.

Image shows a fruit.

Image shows a fruit, which have been cut in half longitudinally through the middle. Label it.

Explanation

Labelled drawing of the cut surfaces given below:

Image shows an apple fruit with labelling

Image shows an apple fruit with labelling

Image shows a labelled drawing of the cut surfaces of apple

Question number: 29

Essay Question▾

Describe in Detail

Starch is a type of carbohydrate present in many of our food Items. Carbohydrates are energy-yielding components of food.

Here three types of food material are given. Identify the presence of carbohydrate

Image shows three types of food material

Image shows three types of food material

Image shows three types of food material. Identify the presence of carbohydrate

Explanation

  • To identify the presence of carbohydrate in food material first place the all materials in separate and clean petri plate.
  • Drop out iodine solution to each item (2 - 3 drops).
  • When we observe all three petri plates
  • Blue-black colour appears on bread slice and potato slice, whereas, chickpea seeds do not show any change in colour.
  • It shows Bread and potato contain starch which gives blue-black in color on addition of iodine solution.
  • Chickpea seeds do not contain starch and thus do not show any change in color.
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