Biology_Lab_Practical_Notes_Section_3 - Biology Lab...

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Diversity of Life on Earth Plants Animals Autrophic Heterotrophic I. Green Plants (plants in gen.): Eukaryotic Chlorophylls a and b, and carotenoids Cellulose cell walls Unicellular or multicellular Embryos develop in maternal tissue Unique alternating phase life cycle Reproduction. More animal species than other living things due to abundance of insects. Eukaryotic Lack cell walls Multicellular Reproduce asexually or sexually Ingestion and digestion of food I. Phylum Porifera Aquatic, most inhabit the oceans Three-layered perforacted sac- Epidermis, jelly-like middle with amoeboid cells, and inner layer composed of cells fitted with flagella. Cells not organized into tissues. Water moves through perforated body wall and out the osculum, brings food and oxygen, carries away wastes such as carbon dioxide and ammonia. Have skeletons (classification entity)-calcium carbonate, silicon, and protein. Asexual reproduction through budding or breaking off of pieces Sexual reproduction: some amoeboid cells ddevelop into sperm and eggs, which unite to form zygotes that develop into mobile larvae, move to a rock and become immobile Eumetazoans Tissues: collections of cells that work together in some integrated fashion to carry out specialized functions. Radially symmetrical animals Body arranged around central axis Planes divide animal into two equal halves. Phylum Cnidaria Most are salt-water creatures III. Chlorophytes (green algae) Land, Fresh water, or Sea Embryos develop outside mother plant Asexual or Sexual reproduction Ex. Chlomydomonas Specialization of gametes Isogamy-gametes cannot be easily identified as male or female because the gametes are the same size. Earliest approach to reproduction. Aggregate-group of cells
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This note was uploaded on 04/11/2011 for the course BIO 111 taught by Professor Dr. bos during the Winter '10 term at Purdue University-West Lafayette.

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Biology_Lab_Practical_Notes_Section_3 - Biology Lab...

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