Life Cycle - Organisms (5B)
Post Lab 

  • Comparing which organisms reproduce sexually and which reproduce asexually.
  • Comparing characteristics of the 6 kingdoms.
  • animal
  • fungi
  • kingdom
  • monera
  • plant
  • protozoa
  • worksheet
  • kingdom chart

Students use a worksheet to compare asexual and sexual reproduction.


The reason for grouping into Kingdoms is not always obvious. The development of a classification scheme probably started when humans began to think. Aristotle recorded his classification scheme into vegetables and animals. There have been many classification schemes developed through time, changing from 2 kingdoms to 3 to 4 and to the present 6 kingdom system. Don't be surprised if this changes. There are many organisms that we simply don't know enough about.

You may want students to bring in pictures of different organisms as a homework assignment. Have them classify their organisms within the 6 kingdom scheme. Have the class decide where the organisms should go. Remember how the organisms eat and reproduce help to group the organisms.

The simplest organisms are either bacteria or a blue-green algae and classified in the large grouping of Monera. Monera has been recently divided into 2 major groups of Eubacteria and Archeobacteria. Both groups have a very simple nucleus that is not surrounded by a nuclear envelope. The Archeobacteria are more ancient than the Eubacteria. The Kingdom Protista or Protozoa is made up of one celled organisms that have a nuclear membrane. Protozoa will eat their food and asexually reproduce more commonly than they would sexually reproduce. The Fungi lack chlorophyll and absorb food from the surrounding ground. Fungi possess organs and reproduce by sexual means (spores). The Plant Kingdom is characterized by its member's ability to reproduce by either sexual or asexual means. The animal kingdom is divided into invertebrates and vertebrates. An animal eats its food and reproduces mainly by sexual means. Organs are much more developed in the Animal Kingdom than in the other kingdoms.

  1. Discuss with students that living organisms are grouped into kingdoms so it is easy for people to discuss them. Either make a transparency or use the enclosed master as a worksheet to illustrate the common phyla within each kingdom.
  2. You may want to use the following summary:




make own food, mainly green

(including Eubacteria and Archeobacteria

one cell, primitive nucleus


one cell, eat food


absorb food


multicellular, eat food

  1. Give students the blank "Tree of Life" and have them draw what they think the organisms look like.

  [Back to Life Cycle Grid]  [Back to Organisms (5)]