Available Answers

1. 1.

   Define the term 'species'.

2. 2.

   Given below are five examples of hybrids produced by man. Name the two closely related animals by interbreeding between which these hybrids have been produced.

   1. Mule = _________________ and _______________
   2. Lenky = ________________ and _______________
   3. Tigon = ________________ and _______________
   4. Geep = ________________ and _______________
   5. Hinny = ________________ and _______________
3. 3.

   Arrange the following categories of classification in their proper ascending sequence:

   kingdom, species, order, genus, family, phylum, class

4. 4.

   Given below are the characteristic features of five kingdoms of living beings. Identify the kingdom and write one example of each:

   1. Unicellular and prokaryotic:
      1. Kingdom: 
      2. Example:
   2. Multicellular, eukaryotic and heterotrophy:
      1. Kingdom:
      2. Example:
   3. Multicellular, saprophytic and eukaryotic:
      1. Kingdom:
      2. Example:
   4. Multicellular, antotrophy and eukaryotic:
      1. Kingdom:
      2. Example:
   5. Unicellular and eukaryotic :
      1. Kingdom:
      2. Example:
5. 5.

   Write two main characteristic features of the following phyla citing two examples each:

   1. Protozoa
   2. Porifera
   3. Coelenterata
   4. Annelida
   5. Arthropoda
   6. Mollusca
   7. Echinodermata
6. 6.

   Given below is the name of the phylum and names of three animals. Underline the two animals which belong to the phylum.

   1. Pisces: Dogfish, Cuttlefish, Shark
   2. Reptilia: Alligator, Crocodile, Salamander.
   3. Aves: Ostrich, Bat, Crow.
   4. Platyhelminthes: Roundwarm, Liver-fluke, Tapeworm.
   5. Arthropoda: Crayfish, Millipede, Earthworm.