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Biology Module 2

Study Guide

QuestionAnswer
Pathogen An organism that causes disease.
Saprophyte An organism that feeds on dead matter.
Parasite An organism that feeds on a living host.
Aerobic An organism that requires oxygen.
Anaerobic An organism that does not require oxygen.
Steady State A state in which members of a population die as quickly as new members are born.
Exponential growth population growth that is unhindered because of the abundance of resources for an ever increasing population.
Logistical growth Population growth that is controlled by limited resources.
Conjunction A temporary union of two organism for the purpose of DNA transfer.
Plasmid A small circular section of DNA that confers one or more traits to a bacterium and can be reproduced separately from the main bacterium
Transformation The transfer of a DNA segment from a nonfunctional donor to that of a functional recipient cell.
Transduction The process in which infection by a virus results in DNA being transferred from one bacterium to another.
Endospore The DNA and other essential parts of a bacterium coated with several hard layers.
Strains Organisms from the same species that have markedly different traits.
What is the most popular means by which bacteria obtain food? Heterotroph Decomposers
If a bacterium is parasitic, is it heterotrophic or autotrophic? Heterotrophic
A sample of food is dehydrated, which kills all of the bacteria. But, in a few days, bacteria free water is added to the food in a bacteria free environment. Still, investigations indicate that bacteria are in the food. How did the bacteria get there? They were in the food as endospores
What kind of growth does a population of bacteria experience when just a few of them are placed in an environment rich with resources? Exponential growth
A population of bacteria experiences logistical growth. What can you say about the resources of their environment? The resources are limited but not gone
A bacterium is heterotrophic and Gram-negative. To what phylum and class does it belong? phylum Gracilicutes, class Scotobacteria
A spirillum bacterium is Gram-positive. To what phylum and class does it belong? phylum Firmicutes, class Thallobacteria
A bacterium has no cell wall. to what phylum and class does it belong? phylum Tenericutes, class Mollicutes
A bacterium lives in boiling-hot water. To what phylum and class does it belong? phylum Mendosicutes, class Archeabacteria
In the six-kingdom classification system, what replaces kingdom Monera? kingdom Archeabacteria and kingdom Eubacteria
Created by: AwesomEBeth