br Home » BIOLOGY YEAR 9 TERM 1 EXAM

BIOLOGY YEAR 9 TERM 1 EXAM

  1. Define the following terms:                                                                                                       4marks.
  2. Photosynthesis.

……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

  • Ecology.

……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

  • Food web.

……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

  • Decomposers

……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

  • Explain why photosynthesis only takes place inside chloroplasts.                                  1marks.

……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

  • a ) Give 2 examples of mineral salts that are needed by plants.                                     2marks

……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

b) Explain why a plant does not have enough magnesium will not grow well.              2marks

……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

        4.    Explain 4 roles of water to plant                                                                                           8marks

……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

5. Explain why plants need help to get their male gametes to their female gametes. 1marks.

…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

        6.    a) Explain what is meant by seed dispersal.                                                                 1 mark.

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

                b) Explain why seed dispersal is important for plants.                                                   2marks.

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

                c) List 3 ways in which fruits can help with seed dispersal.                                           3marks.

……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

       7.  Explain 3 factors affecting the size of animal population.                                               6marks.

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

       8.     State and explain the effects of fertilizers population in water.                                       10 marks.                                     

……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………