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What are the main structural features of a Paramecium as mentioned in its morphology?
What are the main structural features of a Paramecium as mentioned in its morphology?
A Paramecium has a slipper-shaped body covered by a pellicle, cilia arranged in longitudinal rows, and a differentiated cytoplasm with ectoplasm and endoplasm.
Describe the distinction between the anterior and posterior daughter cells formed during binary fission of Paramecium.
Describe the distinction between the anterior and posterior daughter cells formed during binary fission of Paramecium.
The anterior daughter cell is called proter, while the posterior daughter cell is known as opisthe.
Explain the significance of the endoplasmic bridge during the conjugation of Paramecium.
Explain the significance of the endoplasmic bridge during the conjugation of Paramecium.
The endoplasmic bridge facilitates genetic exchange between two Paramecia by connecting their cytoplasmic contents.
Identify the roles of contractile vacuoles in a Paramecium's endoplasm.
Identify the roles of contractile vacuoles in a Paramecium's endoplasm.
How do the structures of ectoplasm contribute to the Paramecium's defense mechanisms?
How do the structures of ectoplasm contribute to the Paramecium's defense mechanisms?
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Study Notes
Paramecium Morphology
- Paramecium is slipper shaped, with a defined outer layer called a pellicle.
- The body is covered in cilia arranged in longitudinal rows.
- The cytoplasm is divided into ectoplasm and endoplasm.
- Ectoplasm contains trichocysts, organelles used for defense and anchorage.
- Endoplasm contains two contractile vacuoles (each surrounded by radial canals) and numerous food vacuoles.
- Paramecium has a complex food passage: peristome, vestibule, buccal cavity, cytostome, and cytopharynx.
Paramecium in Binary Fission
- Binary fission involves a transverse constriction around the body.
- The anterior daughter is called the proter, while the posterior daughter is called the opisthe.
- Each daughter inherits a macronucleus, a micronucleus, and two contractile vacuoles.
Paramecium Conjugation
- Two Paramecia meet along their ventral surfaces.
- An endoplasmic bridge forms between the two individuals.
- Each conjugant contains a male pronucleus and a female pronucleus.
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