Newborn hamsters


Notes:

• Biodiversity vs Variation classification (e.g. Phylogenetic Trees)
• Grouping based on internal features e.g. bilateral symmetry, radial symmetry, triploblastic
• Earthworms the first organisms to have all the features human beings have
• Mollusca --> Secrete minerals outside the organism
• Starfish--> Starfish the only organism that does not follow the trend; it has pentagonal symmetry (same distance from the mouth)
• Similar body plans <--> observation of zygotes and how they divide into bigger masses
• As they divide along different lines of symmetry, they form different shapes and patterns, which in turn determine the organisms' inner and outer layers.
• Embryo resemblances (esp at the initial stages)
• No matter how different we appear to bem we are still similar!
• How similar we are is dependent on rate of DNA hybridization (>no. of matches --> >similar)
• Earliest whales lived on land and had limbs. Till today, some aspects of their behaviour still reflect this: Whales' movement is up-down (resembling that of mammals running on land) unlike fishes whose movement is generally characterised by left-right swishing.
• Similar skeletal organization/patterns of internal structure
• Mathematical perspective:
• E.g. Pascal's Triangle, Fibonnacci series, golden ratio
• Angles, shape configurations based on certain principles: 1. Economical (minimum wastage of materials), 2. Efficiency (less work) 3. Adaptability --> Logic in biological design
• The human perception
• Limits of human perception: inability to predict values and ideas like volume, colour hue etc

The mother hamster (which belongs to my sis) with her baby hamster