Science Flashcards
Test Wednesday, February 19, 2025
Antibiotic
Chemical produced by bacteria that limits the growth of other bacteria
Pathogen
any organism that produces disease
Toxins
poisonous substances produced by a pathogen
vaccine
can prevent some bacterial diseases by helping the body to learn to recognize certain harmful bacteria
What are the two groups of bacteria?
Eubacteria (True Bacteria) and Archaebacteria (Ancient Bacteria)
What is the simplest type of organism in all kingdoms?
Bacteria
Are bacteria unicellular or multicellular?
Unicellular
Are bacteria prokaryotes or eukaryotes?
Prokaryotes
Can bacteria be autotrophs or heterotrophs?
Yes, bacteria can be autotrophs or heterotrophs.
How do bacteria reproduce?
Bacteria reproduce by mitosis/binary fission or conjugation.
What is binary fission?
Binary fission is when a bacterium splits into two cells.
What is conjugation in bacteria?
Conjugation is when two bacteria come together to exchange genetic material.
What is the major difference between bacteria and other kingdoms?
Bacteria have DNA spread throughout the cell with no nucleus.
What are the three basic shapes of bacteria?
Spherical (cocci/coccus), Rodlike (bacillus), and Spiral (spirillum).
What are some benefits of bacteria?
Bacteria help digest food, decompose tissue, convert nitrogen into nitrates, and are used to make foods like cheese, sourdough bread, soy sauce, pickles, and yogurt.
What can harmful/bad bacteria do?
Harmful bacteria may contaminate food or cause diseases in plants and animals.
Name two diseases caused by bacteria.
Strep throat and pneumonia.
How can bacterial diseases be treated?
Bacterial diseases can be treated with antibiotics.
How are bacteria classified based on their movement?
Bacteria are classified into groups by how they move, such as plant-like, animal-like, and fungus-like.
How do plant-like protists move?
Plant-like protists, such as Euglena, use a whip-like tail called a flagella to move.
How do animal-like protists move?
Animal-like protists, like Amoeba, use pseudopods (feet), and Paramecium use cilia (hairs) to move.
What are fungus-like protists?
Fungus-like protists resemble fungi and have characteristics of both fungi and protists
What are the three types of protists?
The three types of protists are plant-like, animal-like, and fungus-like.
What is the method for moving of Euglena?
Euglena moves using a whip-like tail called a flagella.