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the cytoplasm (cyclosis), and the formation of another vacuole begins. Food vacuoles travel in a defined route through the organism (Fig. 16-3). They first pass posteriorly, then anteriorly, and finally posteriorly to the region of the oral groove where the undigestible contents are eliminated through the cytopyge (anal pore). Locate a food vacuole. Observe that when it is first formed, the vacuole is bright red-orange. Closely observe the vacuole as it moves through the protozoan. You will see that during digestion, its contents change from red-orange to blue-green to yellow-green to yellow and finally back to red-orange (Fig. 16-3). The reason for this color change is that Congo red is an indicator dye that changes color with pH: it is blue-green in acidic conditions and red-orange in alkaline conditions. What does this indicate about the pH of the food vacuole as it moves through the organism? The ph changes on the food to dagest the food on the Ph level that neutvines are taking What similarity is there between the pH of the food vacuole as it passes through this animal and that of the mouth, stomach, and intestines in human beings? The similarity there is between the Ph of the food vacuole as it passes through this animal and in a human being is that there's a system in which theres different organisms play a different role. c. Reproduction The most common type of reproduction in protozoa is binary fission. In this type of asexual reproduction, the cell divides into two genetically identical daughter cells. In flagellates, the plane of division is longitudinal; in ciliates, the parent cell divides transversely. Examine demonstration slides of Paramecium showing the various stages of binary fission (Fig. 16-4). Occasionally, paramecia reproduce sexually by conjugation (Fig. 16-5), in which micronuclei are exchanged. You can observe conjugation in Paramecium by carrying out the following procedure. For this study, you will use mating strains of Paramecium bursaria, which is symbiotic with a green alga. Supplement your observations by examining commercially prepared slides showing various stages of conjugation. Put a small drop of one of the two mating strains into the depression of a deep-well slide. While observing the paramecia with a stereoscopic microscope, add a drop of the second mating strain. You should observe, almost immediately, the agglutination (or clumping) of opposite mating strains, which brings the cells together for the transfer of nuclear material. Place the slide in a covered petri dish containing moist filter paper to prevent dessication of the culture. Examine periodically. Conjugating paramecia can be seen for up to 48 hours, after which few or no conjugants are found. ANTERIOR Yellow-green Yellow (alkaline) Orange Red-orange Cytostome Cytopyge (anal pore) Waste Food vacuole forming (red) Red-orange Blue-green (acid) POSTERIOR 2. Other Ciliates

the cytoplasm (cyclosis), and the formation of another vacuole begins. Food vacuoles travel in a defined route through the organism (Fig. 16-3). They first pass posteriorly, then anteriorly, and finally posteriorly to the region of the oral groove where the undigestible contents are eliminated through the cytopyge (anal pore). Locate a food vacuole. Observe that when it is first formed, the vacuole is bright red-orange. Closely observe the vacuole as it moves through the protozoan. You will see that during digestion, its contents change from red-orange to blue-green to yellow-green to yellow and finally back to red-orange (Fig. 16-3). The reason for this color change is that Congo red is an indicator dye that changes color with pH: it is blue-green in acidic conditions and red-orange in alkaline conditions. What does this indicate about the pH of the food vacuole as it moves through the organism?

The ph changes on the food to dagest the food on the Ph level that neutvines are taking

What similarity is there between the pH of the food vacuole as it passes through this animal and that of the mouth, stomach, and intestines in human beings?

The similarity there is between the Ph of the food vacuole as it passes through this animal and in a human being is that there's a system in which theres different organisms play a different role.

c. Reproduction

The most common type of reproduction in protozoa is binary fission. In this type of asexual reproduction, the cell divides into two genetically identical daughter cells. In flagellates, the plane of division is longitudinal; in ciliates, the parent cell divides transversely. Examine demonstration slides of Paramecium showing the various stages of binary fission (Fig. 16-4). Occasionally, paramecia reproduce sexually by conjugation (Fig. 16-5), in which micronuclei are exchanged. You can observe conjugation in Paramecium by carrying out the following procedure. For this study, you will use mating strains of Paramecium bursaria, which is symbiotic with a green alga. Supplement your observations by examining commercially prepared slides showing various stages of conjugation. Put a small drop of one of the two mating strains into the depression of a deep-well slide. While observing the paramecia with a stereoscopic microscope, add a drop of the second mating strain. You should observe, almost immediately, the agglutination (or clumping) of opposite mating strains, which brings the cells together for the transfer of nuclear material. Place the slide in a covered petri dish containing moist filter paper to prevent dessication of the culture. Examine periodically. Conjugating paramecia can be seen for up to 48 hours, after which few or no conjugants are found.

ANTERIOR
Yellow-green
Yellow (alkaline)
Orange
Red-orange
Cytostome
Cytopyge (anal pore)
Waste
Food vacuole forming (red)
Red-orange
Blue-green (acid)
POSTERIOR
2. Other Ciliates

the cytoplasm (cyclosis), and the formation of another vacuole begins. Food vacuoles travel in a defined route through the organism (Fig. 16-3). They first pass posteriorly, then anteriorly, and finally posteriorly to the region of the oral groove where the undigestible contents are eliminated through the cytopyge (anal pore). Locate a food vacuole. Observe that when it is first formed, the vacuole is bright red-orange. Closely observe the vacuole as it moves through the protozoan. You will see that during digestion, its contents change from red-orange to blue-green to yellow-green to yellow and finally back to red-orange (Fig. 16-3). The reason for this color change is that Congo red is an indicator dye that changes color with pH: it is blue-green in acidic conditions and red-orange in alkaline conditions. What does this indicate about the pH of the food vacuole as it moves through the organism?

The ph changes on the food to dagest the food on the Ph level that neutvines are taking

What similarity is there between the pH of the food vacuole as it passes through this animal and that of the mouth, stomach, and intestines in human beings?

The similarity there is between the Ph of the food vacuole as it passes through this animal and in a human being is that there's a system in which theres different organisms play a different role.

c. Reproduction

The most common type of reproduction in protozoa is binary fission. In this type of asexual reproduction, the cell divides into two genetically identical daughter cells. In flagellates, the plane of division is longitudinal; in ciliates, the parent cell divides transversely. Examine demonstration slides of Paramecium showing the various stages of binary fission (Fig. 16-4). Occasionally, paramecia reproduce sexually by conjugation (Fig. 16-5), in which micronuclei are exchanged. You can observe conjugation in Paramecium by carrying out the following procedure. For this study, you will use mating strains of Paramecium bursaria, which is symbiotic with a green alga. Supplement your observations by examining commercially prepared slides showing various stages of conjugation. Put a small drop of one of the two mating strains into the depression of a deep-well slide. While observing the paramecia with a stereoscopic microscope, add a drop of the second mating strain. You should observe, almost immediately, the agglutination (or clumping) of opposite mating strains, which brings the cells together for the transfer of nuclear material. Place the slide in a covered petri dish containing moist filter paper to prevent dessication of the culture. Examine periodically. Conjugating paramecia can be seen for up to 48 hours, after which few or no conjugants are found.

ANTERIOR
Yellow-green
Yellow (alkaline)
Orange
Red-orange
Cytostome
Cytopyge (anal pore)
Waste
Food vacuole forming (red)
Red-orange
Blue-green (acid)
POSTERIOR
2. Other Ciliates

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