MATERIALS NEEDED FOR COLLECTION OF ORGANISMS

MATERIALS NEEDED FOR COLLECTION OF ORGANISMS

  • Knives to cut portions of plant stem/root or uproot
  • Polythene bags to put the collected plant or specimens
  • Insect collecting jars
  • Insect killing jars
  • Hand gloves
  • Sweep nets
  • Pooters
  • Traps

Observation of Organisms

  • Observe the plant/animal in its natural habitat before collecting
  • Identify the exact place -on surface, under rock, on tree trunk, on branches
  • What does it feed on?
  • How does it interact with other animals and the environment?
  • How many of that kind of plant or animal are in a particular place?
  • Plant specimens placed on the bench and sorted out into;- seeds/stems/roots/leaves/fruits
  • Animal specimens may be left inside polythene bags if transparent
  • Others (killed ones) are put in petri¬ dishes
  • Use hand lens to observe the external features of small animals

Presenting the Results of Observations

  • Organisms are observed and important features noted down: colour, texture ¬hard or soft; if hairy or not

Size is measured or estimated

  • Biological Drawings – It is necessary to draw some of the organisms
  • In making a biological drawing, magnification (enlargement) is noted
  • Indicate the magnification of your drawing i.e. how many times the drawing is larger/smaller than the actual specimen MG=length of drawing/length specimen
See also  BIOLOGY OF HEREDITARY AND VARIATION

How to Draw

How does it interact with other animals and the environment?

  • Several drawings of one organism may be necessary to represent all features observed, eg
  • Anterior view of grasshopper shows all mouth parts properly, but not all limbs
  • Lateral (side) view shows all the legs

Collection, Observation and Recording of Organisms

Collection

  • Plants and animals collected from the environment, near school or within school compound using nets, bottles and gloves
  • Animals collected include:-arthropods, earthworms and small vertebrates like lizards/chameleons/ rodents
  • Place in polythene bags and take to the laboratory
  • Stinging/poisonous insects killed using ether
  • Other animals are observed live and returned to their natural habitat
  • Plant specimen collected include:- leaves, flowers and whole plants
  • Observations are made to show the following:-
  • Plants have roots, stems, leaves and flowers

Animals have legs, hair, hard outer covering, feathers, eyes, mouth, limbs and other appendages

 

Also See:

DETERMINATION OF THE GENOTYPE OF A DOMINANT PHENOTYPE

VARIATION IN POPULATION

CLASSIFICATION OF ANIMALS AND ORGANIZATION OF LIFE

CLASSIFICATION OF LIVING ORGANISMS

DIFFERENCES BETWEEN PLANTS AND ANIMALS

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