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WorksheetsClassification Practice
Total questions: 25
Worksheet time: 21mins
Amanda learns that some species of algae share the characteristics of being single-celled and producing sugar by photosynthesis. These species of algae fall into the category of which of the following kingdoms?
Animalia
Fungi
Plantae
Protista
Select all cell structures that are found in both prokaryotes and eukaryotes.
plasma membrane
ribosomes
nucleus
cytoplasm
cell walls
eukaryotic
heterotrophic
usually multicellular
Which characteristic BEST indicates that the organism in question above is a fungus, not a plant?
Cell walls
Eukaryotic
Heterotrophic
Usually multicellular
Read the passage "Scientific Names".
SCIENTIFIC NAMES
Long ago, when humans first started to name organisms, every group of people had a different name for the same living thing. Many years later, scientists fixed this problem by giving every living thing a scientific name that would be known worldwide. For example, in English we call a certain bird a "bald eagle." In Spanish, the same bird is called "águila calva." However, scientists around the world know the bird by its scientific name: Haliaeetus leucocephalus.
Why is assigning scientific names to living things important?
It helps identify where the living thing was first found in the world.
It stops the use of common names like "bald eagle" and "águila calva."
It helps scientists identify the same living thing, even in a different language.
It prevents scientists from using the same organisms to replicate experiments.
What term refers to a person who identifies and classifies organisms?
taxidermist
taxonomist
florist
agronomist
Which of the following statements about archaea and bacteria is true?
Neither is single-celled.
They both have nuclear membranes
Neither reproduces by binary fission.
They both lack a nuclear membrane.
As environments change, some organisms become endosymbiotic, which is to say, organisms are able to live within the body or cells of another organism. Which feature of protists is probably endosymbiotic in origin?
cysts
microtubules
nucleus
mitochondria
Which organelles do scientists believe originated by symbiotic relationships between primitive eukaryotes and certain prokaryotes?
nuclei and mitochondria
chloroplasts and mitochondria
vacuoles and Golgi apparatus
storage vesicles and thylakoids
What were the ancestors of mitochondria according to the endosymbiotic theory?
aerobic eukaryotes
aerobic bacteria
anaerobic bacteria
chloroplasts
The table below provides information about nutrition and cellular structure for organisms in different kingdoms.
What information best completes the table?
autotrophic, no, unicellular
autotrophic, yes, multicellular
heterotrophic, no, unicellular
heterotrophic, yes, multicellular
The table below provides information about nutrition and cellular structure for organisms in different kingdoms.
What information best completes the table?
autotrophic, no, unicellular
autotrophic, yes, multicellular
heterotrophic, no, unicellular
heterotrophic, yes, multicellular
Within the evolutionary classification scheme, organisms that belong to the same species
cannot reproduce viable offspring.
have the exact same DNA sequence
are more similar than individuals that belong to the same genus.
are less similar than individuals that belong to the same genus.
A student is learning about infections that can occur in the human body. Infections could be caused by viruses, bacteria, and fungus. The student learns about two infections, influenza and ringworm, and creates a table that describes the infections.
Which statement correctly determines the cause of each infection?
Influenza is caused by a virus because it is a non-living infectious agent that invades a host cell. Ringworm is caused by a fungus because it is a living infectious agent that spreads singlecelled spores.
Influenza is caused by a bacterium because it is a non-living infectious agent that invades a host cell. Ringworm is caused by a fungus because it is a living infectious agent that spreads singlecelled spores
Influenza is caused by a virus because it is a non-living infectious agent that invades a host cell. Ringworm is caused by a bacterium because it is a living infectious agent that spreads single-celled spores.
Influenza is caused by a fungus because it is a non-living infectious agent that invades a host cell. Ringworm is caused by a virus because it is a living infectious agent that spreads singlecelled spores.
A virus usually replicates itself in
the cytoplasm of the host cell.
the nucleus of the host cell.
the cell membrane of the host cell.
in the mitochondrion of the host cell.
Which statement best describes viruses?
They are alive and can survive long periods of time without a host
They are not alive and therefore cannot affect living things.
They are alive, but they need a host cell to survive.
They are not alive, but they affect living things
The table compares a eukaryotic cell and a virus.
Which statement correctly compares a eukaryotic cell and a virus?
A eukaryotic cell can reproduce to make more cells, whereas a virus cannot reproduce.
A eukaryotic cell responds to changes in the environment, whereas a virus cannot adapt.
A eukaryotic cell contains genetic material, whereas a virus does not contain genetic material.
A eukaryotic cell maintains homeostasis, whereas a virus does not possess the required organelles.
Many viruses and bacteria are pathogens which cause disease. Characteristics of each are listed in the chart below.
Which argument correctly compares viruses and bacteria?
Viruses and bacteria are both living organisms because they are both capable of causing disease.
Viruses and bacteria are both living organisms because they both contain DNA and are capable of reproducing.
Viruses are living organisms because they contain DNA and are capable of reproducing inside of a host cell. Bacteria are not living organisms because they are made up of cells and are capable of causing disease.
Viruses are not living organisms because they are not made up of cells and cannot reproduce outside of a host cell. Bacteria are living organisms because they are made up of cells and do not require a host cell to reproduce
The table lists the diameters of common viruses and bacteria. A single micrometer (µm) is equivalent to 1000 nanometers (nm).
Using the table as evidence, which argument can be made about the size of viruses compared to the size of bacteria?
Viruses are smaller than most bacteria.
Bacteria are smaller than most viruses
Bacteria and viruses are about the same size
Viruses are both smaller and larger than bacteria.
Which table correctly compares a virus and a living organism?
Match the description to the infectious agent.
tiny, single-celled organisms with no nucleus inside the digestive track
bacteria
virus
fungi
parasite
Match the description to the infectious agent.
no cells, takes over a host cell from which it replicates and spreads into neighboring host cells
bacteria
virus
fungi
parasite
Match the description to the infectious agent.
multicellular organisms made up of cells that have cell walls and well-defined nuclei
bacteria
virus
parasite
fungi
Match the description to the infectious agent.
an organism that lives in or on another organism and takes nutrients at the expense of the host.
bacteria
fungi
virus
parasite
Which of the following is not a viral disease?
SARS-COV-2
Smallpox
Tuberculosis
Influenza
Which of the following gram-positive bacteria causes pharyngitis (sore throat)?
Neisseria
Streptococcus
Staphylococcus
Mycobacterium
