Bio Exam 1

Ceratium are single-celled organisms that have a distinctive shape with two long horns that extend from the cell body.

Chlamydomonas is a genus of green algae known for its single-celled structure and flagella, distinguishing it from other types of microorganisms like Euglena, Cyanobacteria, and Diatoms.

Tetanus is caused by the bacterium Clostridium tetani, which produces a neurotoxin that affects the nervous system.

Diatom strew refers to the fossilized remains of diatoms, which are microscopic algae with hard shells made of silica.

Euglena is a genus of single-celled flagellate eukaryotes that is commonly found in freshwater environments. They are unique in that they can act as both plant-like and animal-like cells, exhibiting both photosynthesis and the ability to consume food. Euglena are important organisms in aquatic ecosystems.

Paramecium is a type of single-celled organism belonging to the group of ciliates, characterized by cilia and two types of nuclei.

Spirogyra is a type of filamentous green algae characterized by its spiral chloroplasts and is commonly found in freshwater environments.

Staphylococcus aureus is the correct scientific name for the bacterium known as MRSA, which stands for methicillin-resistant Staphylococcus aureus. Escherichia coli, Salmonella enterica, and Clostridium difficile are other bacteria that cause different types of infections but are not synonymous with MRSA.

Trypanosome lewisi is a parasitic protozoan that infects rats, causing Trypanosomiasis also known as rat trypanosomiasis.

Cholera is caused by the bacterium Vibrio cholerae, not the other mentioned bacteria.

Volvox is a unique organism classified as a type of freshwater green algae that forms colonies. It is not related to cats, birds, or dinosaurs.

Bacillus anthracis is the correct answer as it is the bacterium responsible for causing anthrax, a serious infectious disease that primarily affects livestock but can also be transmitted to humans.

Clostridium botulinum is a bacterium known for producing botulinum toxin, which can cause botulism when ingested. It is commonly found in soil and can contaminate improperly preserved or canned foods.

Tetanus is caused by the bacteria Clostridium tetani, which produces a neurotoxin known as tetanospasmin.

Planaria are a type of flatworm known for their regenerative abilities and simple anatomy.

Amoeba proteus is a species of amoeba known for its characteristic shape-shifting abilities, while Euglena gracilis, Paramecium caudatum, and Volvox aureus are distinct single-celled organisms with their own respective features and characteristics.

Escherichia coli, commonly known as E. coli, is a type of bacteria that is typically harmless but can cause food poisoning and other infections when consumed in contaminated food or water.

Radiolaria strew refers to the silica skeletal remains of radiolarians, which are marine planktonic organisms known for their intricate mineral skeletons.

Staphylococcus epidermidis is a common bacteria that resides on human skin, particularly in moist areas. Escherichia coli, Salmonella enterica, and Clostridium botulinum are also bacteria, but they are not typically found on human skin.

Treponema is a genus of spiral-shaped bacteria known for causing diseases such as syphilis and yaws in humans.

A hydra is a mythical creature from Greek mythology known for its regenerative abilities and multiple heads.

Planaria is a type of flatworm, not a jellyfish, beetle, or seahorse.

Daphnia is commonly used in aquatic toxicity testing as they are sensitive to changes in water quality and are easy to study in laboratory settings.

The correct answer is Elodea leaf as it belongs to the Elodea genus of aquatic plants commonly found in freshwater environments.

Anabaena is a type of cyanobacteria commonly found in freshwater environments. It is known for its ability to perform photosynthesis and fix nitrogen.

Formanifera are single-celled organisms with calcium carbonate shells that lived in the ocean millions of years ago. When they die, their shells accumulate on the ocean floor, forming what is known as Formanifera strew.

Trypanosome lewisi is a protozoan parasite that infects rats, not a bacteria, virus, or fungus.

Streptococcus pneumoniae is the primary bacteria responsible for causing pneumonia in humans. Escherichia coli and Staphylococcus aureus are not typically associated with pneumonia, while Mycobacterium tuberculosis is known for causing tuberculosis, not pneumonia.

Tetanus, also known as lockjaw, is caused by the bacterium Clostridium tetani which is commonly found in soil and animal excrement. It enters the body through cuts or wounds and produces a toxin that affects the nervous system.