Lab Test 1: Microbial Diversity


Terms in this set (...)

Based on your observations/data differentiate between bacterial, protist, and fungal organisms. (Be specific, provide ex)
Bacteria had similar overall shapes. For ex, Nostoc and the cocci bacteria were circular. Oscillatoria and Oedeogonium both were rod-shaped structures like the bacilli. Protists have a variety of structures and shapes. Protists have more specialized structures. For ex, the euglena has a flagella for locomotion. Similarly, volvox have cilia for the same reason. Pseudopods are possessed by amoeba for locomotion. Fungi have a variety of different shapes. Rhizophus, whilst possessing an umbrella shaped "head," has a very different shape from the tear-dropped shaped Sordaria.
Based on your observations/data, contrast algae and protozoan protists. (Be specific, provide ex)
Algae are protists that have a cell wall. They are also possess a box-like shape and a nucleus. The cells walls comprise of cellulose. Protozoans have a variety of shapes, in contrast, and they are usually more circular than box-like in structure. Volvox, for ex., have a very distinct circular shape. Protozoans are also unicellular, but algae can be either multicellular or unicellular. Protozoans also lack the concise, rigid shapes that algae possess because protozoans lack a cell wall. Spirostomum, for ex., are "worm-like" in structure as they lack a cell wall.
Explain why protists such as an amoeba, paramecium, and euglena have distinctive organelles for locomotion and a contractile vacuole.
These particular protists possess contractile vacuoles in order to aid in the regulation of water and in order to pump water out of their cells. Some protists have two contractile vacuoles in order to better regulate water intake. Flagella and cilia are distinctive organelles that assist in locomotion. Protists have these structures in order to easily and quickly move, especially tho who live in aquatic environments. Amoebas have pseudopods, which also aid in locomotion. Amoeba move slowly, and they also use their pseudopod movement to engulf their food.
Differentiate between the nutritional methods of bacteria, protist, and fungi.
The nutritional methods of bacteria vary with the different types of bacteria. Some bacteria are autotrophic, or make their own food. Some bacteria are heterotrophic, which means they really on other organisms for food. Bacteria could be both autotrophic and heterotrophic. They could also be either phototrophic or chemotrophic. Phototrophic bacteria rely on sunlight in order to make their own food. Chemotrophic bacteria rely on certain chemical processes that do not require sunlight in order to make their own food. Protists also vary in how they obtain nutrients. Some protists are autotrophs, while some are fungus-like and decompose decaying matter. Protozoan protists are heterotrophs. Fungi get nutrition by absorbing certain organic compounds or gaining nutrients from non-living organic matter.
Identify key characteristics of the protist phylums: Cilophora and Chlorophyta.
Organisms in Ciliophora have a distinctive organelle- cilia- whereas organisms in Chlorophyta are autotrophic and contain chloroplasts.

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