IGCSE Biology Paper-5: Specimen Questions with Answers 5 - 6 of 62

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Question 5

Describe in Detail Essay▾

Here you give an example of animal. How its teeth are, differ from human teeth.

Figure Shows the Teeth of Dog


The given picture is related to dog

  • Humans have 32 teeth and doge have 42
  • Humans have (top and bottom) 8 incisors, 4 canines, 8 premolars, and 12 molars. Dogs have (top and bottom) 12 incisors, 4 canines, 16 premolars, and 10 molars
  • Dogs also have Carnassial teeth. The human molars and pre-molars are generally flat, creating the surface area for grinding.

Question 6

Describe in Detail Essay▾

There are some natural and manmade fibers are given below. How will you differentiate them?

Image Shows Different Kind of Fibers


Take one by one thread and hold it with forceps. Then burn it in the flame on a heating device . By doing this we observed Natural fibers (cotton, wool) burn without melting while man-made fibers (polyester, nylon) , first become soft and then melt to form a lump before burning. The fibers, which are change into ash on burning, are natural fibers and those, which melt and form a bead before burning are manufactured (synthetic) fibers.

Image Shows Holding and Burning of Woolen Thread