LAB2 Pits 19 Date: Name CONCLUSIONS AND REVIEW 1. Compare and coatrast uniellala
ID: 149817 • Letter: L
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LAB2 Pits 19 Date: Name CONCLUSIONS AND REVIEW 1. Compare and coatrast uniellalar algae and protozoans What is the function of conjugation in Spiregnet List the steps in the proces. 2. 3. Describe the measfmiy for arrom,Amodha Plamodism, and 7h m, and Trypanosoma 4. Compare and contrast the colonies of Volevox and Spirogyna 5. Englena is unusual because it can survive without its chloroplasts if they are surgically removed How can you explain that? 6. List and describe the major divisions of algae. 7. Describe the type of organisms classified in kingdom Protista. 8. Idencify three ways that can help you ell Plasmodium and Trpansome apartExplanation / Answer
1. Compare and contrast unicellular algae and protozoa:
Algae
Protozoa
1. The algae are plant-like protists.
1. The protozoa are animal-like protists.
2. Algae are "autotrophs".
2. Protozoa are "heterotrophs."
3. Algae are capable of producing their own food.
3. They ingest very minute organisms to feed themselves.
4. Algae floats in rivers and canals or they can be found plastered on rocks.
4. They can move through a flagellum or cilia.
2. Function of conjugation in Spirogyra:
Through this conjugation genetic material is transferred to recipient. It often provides some sort of genetic advantage.
Steps:
i)At first two filaments are lined up side by side.
ii) Then bulge appears from opposite cells.
iii) At that time the bulges touch off each other.
iv) After that the wall between the cells breaks down and forms a conjugation tube.
v) The protoplasts of one filament shrink faster than the other and move through the conjugation tube. These cells are known as male gametes (because they move). The stationery protoplasts are known as female gametes.
vi) The nuclei fuse and form a diploid zygote. The stages are more or less simultaneous in all cells of a filament of empty cells and one containing zygotes.
vii) The zygote forms a thick wall and is then called dormant zygospore.
viii) At last the cell wall rupture and dormant zygospores are liberated.
ix) When favourable conditions return the zygospore germinate by meiosis. Only one of four the four haploid daughter nuclei survives and divides by mitosis to form a new filament.
3. Paramecium: They move by cilia.
Amoeba: They move by extending pseudopodia, cytoplasmic streaming, and changing their shape.
Plasmodium: Only some stages of plasmodium (ookinete and sporozoite) are motile. These use actin filaments, which enable the organism to deform it's shape, facilitating movement.
Trypanosoma: They move by undulating membrane and the free flagellum (when present).
Algae
Protozoa
1. The algae are plant-like protists.
1. The protozoa are animal-like protists.
2. Algae are "autotrophs".
2. Protozoa are "heterotrophs."
3. Algae are capable of producing their own food.
3. They ingest very minute organisms to feed themselves.
4. Algae floats in rivers and canals or they can be found plastered on rocks.
4. They can move through a flagellum or cilia.
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