Overview
Define the terms evolution and variation in relation to living organisms. Identify the relationship between the two terms variation and evolution. Recognise that variation could be morphological or physiological. State a few examples of: (i) morphological variations. (ii) physiological variations. List different ways that individuals vary in their behaviours and functions. Explain the application of variation to crime detection. State the blood group types that can be transfused for an individual with a known blood group. Deduce the possibility of children with a particular blood group belonging to a man (father).
What you'll learn
- Morphological variation (physical appearance) which can be:
- (a) Continuous (size, weight, height, etc.).
- (b) Discontinuous (colour, skin, eyes, hair coat of animal, fingerprints, etc.).
- Physiological variations
- (i) Behaviour
- (ii) Ability to roll the tongue
- (iii) Ability to taste phenylthiocarbamide (PTC)
- (iv) Differences in blood groups (A, B, AB and O).
- Application of Variation
- (i) Crime detection (fingerprints) of dangerous weapons.
- (ii) Blood transfusion.
- (iii) Determination of paternity.