Afaq Sun Series (new) Science 5 - Unit-1 Classifications of living things

Afaq Sun Series (new) Science 5 - Unit-1 Classifications of living things


Unit-1 Classifications of living things
 
Important Definitions:
  • Classification is defined as a method used by scientists to order living organisms into different groups.
  • Scientists classify living things into five main groups called kingdoms.
  • Bateria ar the best examples of the kingdom Monera, They are  single-celled organisms
  • Algae are examples of the Kingdom Protista, They can be unicellular, multicellular or colonial.
  • Fungi exist in unicellular, multi-cellular, or filamentous from. The Kindom fungi include yeast, mushrooms, rhizopus, puffballs, etc.
  • The Kindom Animalia is divided further into two groups: Vertebrates and Invertebrates,
  • The Kingdom Plantae is divided further into tow groups flowering and non-flowering.

Excercise

A: Answer the following questions.
  1. Describe classification in your own words.
    Ans: All living things are classified into groups on the basis of similarities and differences among them.

  2. What is the need and importance of classification?
    Ans: Classification is essential because it helps scientists to identify organisms and break them down into groups.

  3. Prove with facts that algae have both plants and animal characteristics.
    Ans: Algae have the characteristics of both, plants and animals. Algae have chlorophyll so prepare his own food by the process of photosynthesis.

  4. Differentiate between
    1. Unicellular and Multi-Cellular.
      Unicellular organisms are composed of a single cell in an i
      rregular shape.
      Multi-cellular organisms are composed of more than one cell in regular shape.

    2. Flowering and Non-flowering
      Flowering Plants have flowers on their stem and produce seeds which are enclosed in flower or fruits.
      Non-Flowering Plants have no flowers on their  stem. Some nonflowering plants produce seeds; this type of plant is called a gymnosperm.

  5. What are autotrophs?
    Ans: Autotrophs are organisms that can produce their own food, using materials from inorganic sources. An autotroph feeds itself without the assistance of any other organism.
    B: Choose and write the correct option.
    1. Bacteria are . . . . . . . . . . . . . . .  organisms. (multicellular, colonial, unicellular)
    2. Euglena and volvox are examples of . . . . . . .  (fungi, algae, bacteria)
    3. The skeleton outside the bodies of . . . . . . . . .  is made of chitin. (fish, insects, birds)
    4. Classification is done on the basis of _ _ _ _ _ _ _. (similarities, differences, both)