To observe how the simplest organisms, despite consisting of only one cell, perform all the functions of a complex living being—specifically movement and response to the environment (irritability). 2. Materials and Equipment Microscope and glass slides.
Single-celled organisms are not "primitive." They are highly efficient biological machines. The laboratory work demonstrates that the fundamental properties of life—nutrition, movement, and irritability—are present even at the microscopic level. Comparison Table: Amoeba vs. Paramecium Amoeba Proteus Paramecium (Slipper Ciliate) Pseudopodia (flowing) Cilia (rowing) Shape Constantly changing Constant (slipper-like) Speed Relatively fast Feeding Phagocytosis (engulfing) Oral groove (sweeping food in) laboratornaia rabota po biologii 7 klass vakhrushev
A particularly interesting topic to explore is the (or similar protozoa like the Paramecium). Below is a structured report designed to be both scientifically accurate and engaging. Laboratory Report: Life in a Drop of Water To observe how the simplest organisms, despite consisting
: Under the microscope, these organisms appear as transparent, ever-shifting shapes. In Vakhrushev's textbook, emphasis is placed on the pseudopodia (false feet) of the amoeba. It doesn't just move; it "flows" by pushing its cytoplasm forward. Single-celled organisms are not "primitive
: While we use muscles and nerves, the amoeba uses a shifting cytoskeleton to hunt and travel. 5. Conclusion
Investigation of the behavior and structure of Single-Celled Organisms. 1. Purpose of the Work
: Amoebas reproduce by simple division. Technically, the "mother" cell doesn't die; it becomes two "daughters," making their lineage potentially ancient.