LAB2 Pits 19 Date: Name CONCLUSIONS AND REVIEW 1. Compare and coatrast uniellala
ID: 149818 • Letter: L
Question
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 the unicellular algae and protozoans?
Answer:
Algae and protozoans belong to the same kingdom, Protista, which is the kingdom that is used for many organisms that do not fit neatly into another category. Protists include algae, protozoa and slime molds. The major difference between algae and protozoa is that algae are able to make their own food, as plants do, while protozoa ingest other organisms or organic molecules, as animals do. In scientific terms, algae are "autotrophs" and protozoa are "heterotrophs." The word "protozoa" actually refers to this fundamental difference, with "pro" meaning first and "zoa" meaning animal.
2.What is the function of conjugation in spirogyra? List the steps in the process?
Answer:
Spirogyra reproduces sexually by the process of Conjugation. In this process, two cells from different filaments are involved. Two cells are attached with the formation of conjugation tube and the contents of one cell is transferred to the another cell.
Steps involved are as follows:
a) Two filaments of Spirogyra form conjugation tubes.
b)The contents of one cell passes through the tube an fuses with a cell from the other filament.
c) There is fertilisation and formation of zygote.
d) A thick walled resistant zygospore is developed which can remain dormant in the harsh conditions.
3. Describe the means of motility for Paramecium, Amoeba, Plasmodium and Trypanosoms
Answer:
Paramecium: It belongs to the ciliate group. It has got hair like structure on its membrane called as cilia with the help of this cilia it is able to move.
Amoeba: Amoeba moves by extending their cytoplasm and appears to do so in a slow, gliding fashion. These extensions of their cytoplasm are called pseudopodia. This form of movement by extension of cytoplasm is called “amoeboid movement”.
Plasmodium: It employs its own actin/myosin-based motor for forward locomotion, penetration of molecular and cellular barriers, and invasion of target cells.
Trypanosoma: Flagellum is an essential and multifunctional organelle with critical roles in motility, cellular morphogenesis, cell division and many other functions.
4. Compare and contrast the colonies of Volvox and Spirogyra.
Answer: Although they are both green algae they are in completely different classes.
Volvox has a very unique life cycle. Volvox is round while spyrogyra is long.
Volvox is communities of cells. Volvox has sexual and asexual reproduction and spyrogyra only uses sexual type of reproduction.
5. Euglena as unusual behaviour
Answer:
Euglena uses their chloroplasts to produce food by the process of photosynthesis. It acts as a dual organism as it can act both as an autotroph (make its own food) and heterotroph (feed on other substances)
When the chloroplasts are removed, it changes its mode of nutrition by feeding upon the Dead organic matters.
6. List and describe major divisions of Algae
Answer:
a) Division Chlorophyta. Algae of the division Chlorophyta possess green chlorophyll pigments and carotenoid pigments.
b)Division Charophyta. Members of the division Charophyta are stoneworts. Stoneworts cover the bottoms of ponds and may be a source of limestone.
c)Division Euglenophyta. Members of the division Euglenophyta include the common organism Euglena. These organisms have chlorophyll and carotenoid pigments for photosynthesis and flagella for movement. They share many characteristics with both plants and animals
d)Division Chrysophyta. Members of the division Chrysophyta are brown and yellowgreen algae. These organisms contain chlorophyll pigments as well as special carotenoid pigments called fucoxanthins.
e)Division Pyrrophyta. Members of the division Pyrrophyta are pigmented marine forms that include the dinoflagellates, amoeboid cells with flagella as well as protective cellulose plates that surround the cells.
f) Rhodophyta (Red algae)
g) Paeophyta (Brown algae)
h) Xanthophyta (Yellow-green algae)
7. Describe the type of organisms classified in kingdom Protista
Answer:
Protozoans - animal-like single-celled organisms.
Algae - plant-like single or multi-celled organisms.
All single celled organisms are placed under the Kingdom Protista
This kingdom forms a link between other kingdoms of plants, animals and fungi.
Members of Protista are primarily aquatic in nature.
Example: Amoeba, Foraminiferans, Trypanosoma, Paramecium and various classes of Algae
8. Identify three ways that can help u tell Plasmodium and trypansoma apart.
Answer:
Malaria is caused by bacteria called Plasmodium and is carried by the Anopheles Mosquito Treatment Every 48-72 hrs. Red blood cells burst while Sleeping sickness is caused by either of two germs, Trypanosoma brucei rhodesiense & Trypanosomoa brucei gambiense, and these are transmitted by the bite of The Tsetse Fly
Plasmodium uses red blood cells (erythrocytes) for its asexual replication and modulation of adhesion, virulence.
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