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14 Cards in this Set
- Front
- Back
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Who is the 'founding father' of classification? |
Carolus Linnaeus |
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Who removed ''minerals from the 3 kingdoms of organisms? |
Haeckel, and added protists. |
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What is the current argument for the evolution of land plants? |
Thought hat green algae and fungus had a symbiotic erlationship. This is mainly because plants have several fungus-like characteristics. (Pollen tubes, many cells in plants grow intrusively into tissue). |
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What are the main dominant type of plant? |
Angiosperms: Faster growing |
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Why is it thought that fungal origins are closely related to animals? |
They are heterotrophic, feeding on organic material originally synthesised by plants. |
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Describe sponges |
(Porifera) The most basal of the truly multicelluar animals. Evolved from single celled protists. Choanoflagellates (chano - 'funnel') |
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What are the 2 groups of tripoblasts? |
Protostomes and deuterostomes |
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How do protosomes and deuterostomes differ in embryology? |
Cleavage: Cleavage in protosomes is DETERMINATE CLEAVAGE in deuterostomes is INDETERMINATE (the cells fates are not fixed - are stem cells) |
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Becoming bilateral |
Cephalisation and having bilateral symmetry: Mouth as leading end Sense organs near mouth Concentration of nervous tissue (brain) Therefore, mouth and sense organs are kept away from where waste material is expelled. |
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Annelids |
Fluid filled Coelom (within mesoderm) Body is segmented Segments are seperated within by bulkheads/partitions(septa) improved efficiency of peristalsis |
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HOw did the arthropod evolve? |
Arthropods eevolved from an annelid-like ancestor The paddles became jointed limbs. They have a series of JOINTED appendages |
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What do arthropods all have in common? |
Rigid,tubular exoskeleton due to mineralisation. SCLEROTISATION: Component of the cuticles of various arthropoda. Increases the rigidity of an insects chitinous exoskeleton. |
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COmpound eyes and the evolution of the eye |
Started in the precambrian period and evidence comes from the cambrian period. The eye first came from the anomolocaris as a predetory trilobite. This then gave a massive selection pressure for other prey, and it is argued that this started the cambrian explosion. The compound eye: Made up of many ommatidia, each whicgh functions as a seperate visual receptor. |
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Mollusks evolution |
Began the appearance of calcereous shell... Due to the trebling of calcium levels in the sea due to volcanic activity.
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