WorksheetsMicroorganisms and Protists — Worksheet Extraction
Total questions: 52
Worksheet time: 26mins
Classify each disease as communicable or noncommunicable: hypercholesterolemia.
communicable
noncommunicable
Classify each disease as communicable or noncommunicable: arthritis.
communicable
noncommunicable
Classify each disease as communicable or noncommunicable: emphysema.
communicable
noncommunicable
Classify each disease as communicable or noncommunicable: tuberculosis.
communicable
noncommunicable
Classify each disease as communicable or noncommunicable: osteoporosis.
communicable
noncommunicable
Classify each disease as communicable or noncommunicable: stroke.
communicable
noncommunicable
Classify each disease as communicable or noncommunicable: pneumonia.
communicable
noncommunicable
Classify each disease as communicable or noncommunicable: Alzheimer’s disease.
communicable
noncommunicable
In the five-kingdom scheme, which kingdom includes the archaebacteria and eubacteria?
Protista
Fungi
Monera
Animalia
Which statement best describes organisms under kingdom Protista?
Prokaryotic, lacking nuclei
Eukaryotic, single-celled, often aquatic
Multicellular plants with chloroplasts
Viruses that infect bacteria
The kingdom Protista consists of which groups?
Protozoans and algae
Fungi and bacteria
Plants and animals
Viruses and prions
Which labeled organism in the image is Paramecium sp.?
a
b
c
d
Which protozoan group has pseudopodia (false feet)?
Flagellates
Sarcodina
Ciliates
Diatoms
What does the image show about Volvox sp.?
They are ciliate single cells.
They are flagellate protists that live in colonies.
They are amoeboids with pseudopodia.
They are parasitic sporozoans.
Based on the image, what structure do Amoeba sp. use for locomotion?
Cilia
Flagella
Pseudopodia
Contractile stalks
Which description fits Euglena sp.?
Spherical cells that live in colonies
Narrow, elongated cells with a red spot; move using flagella; live singly
Parasitic cells that cause dysentery
Zooflagellates that digest cellulose in termites
Which protozoan is parasitic and causes Gambian sleeping sickness with physical weakness and depression?
Trichomonas sp.
Trypanosoma gambiense
Amoeba proteus
Balantidium sp.
Which habitat is typical for Amoeba proteus according to the table?
Saltwater only
Freshwater; feeds on small organisms
Human intestines
Base of human teeth
Which phylum includes dinoflagellates?
Chlorophyta
Pyrrhophyta
Ciliophora
Rhizopoda
Green algae belong to which phylum?
Chlorophyta
Phaeophyta
Euglenophyta
Oomycota
Ciliates are classified under which phylum?
Actinopoda
Ciliophora
Apicomplexa
Foraminifera
Cellular slime molds belong to which phylum?
Myxomycota
Acrasiomycota
Oomycota
Zoomastigophora
What distinguishes sporozoans among protozoans?
They have cilia and are free-living.
They have flagella and are photosynthetic.
They have no cilia or flagella and live parasitically in hosts.
They are multicellular algae.
Which species of protozoan is a known cause of malaria?
Paramecium caudatum
Plasmodium falciparum
Euglena viridis
Amoeba proteus
Where does sexual reproduction of Plasmodium occur in the mosquito?
Salivary glands
Stomach; zygotes encyst in its lining
Ovary
Mouthparts
Which stage first attacks the red blood cells of the human host?
Sporozoites
Trophozoites
Gametocytes
Zygotes
In temperate zones, about how many daughter cells called merozoites can a Plasmodium parasite produce after growing to full size within 48 hours?
2 to 4
12 to 24
50 to 100
Hundreds to thousands
According to the image, which host carries the parasite during its sexual stage?
Human liver
Human red blood cells
Female Anopheles mosquito
Freshwater protists
Does temperature affect the appearance of microorganisms when samples from hay infusions made with hot water, room‑temperature water, lukewarm water, and cold water are observed under a microscope?
Yes, temperature affects the appearance of microorganisms.
No, temperature does not affect the appearance of microorganisms.
Did you observe parent microorganisms present in the pond water used to seed the hay infusions when viewed under the microscope?
Yes, parent microorganisms were present in the pond water.
No, parent microorganisms were not present in the pond water.
Which kinds of microorganisms are commonly observed in hay‑infusion samples under the microscope? Select all that apply.
Paramecium (ciliated, oval body)
Amoeba (irregular shape with pseudopodia)
Euglena (green, flagellated cell)
Diatoms (silica cell walls with distinct shapes)
Based on observations from hay infusions prepared with different water temperatures, which conclusion is best supported?
Temperature influences the diversity and growth rate of microorganisms in hay infusions.
Pond water contains no microorganisms.
Microscopic observation is impossible without adding stains.
Only cold water supports microbial growth in hay infusions.
Application: Select all organisms that are generally beneficial to humans.
Lactobacillus used in yogurt fermentation
Baker’s yeast (Saccharomyces cerevisiae) used in bread making
Influenza virus
Salmonella bacteria causing foodborne illness
Application: Select all organisms that are generally harmful to humans.
Salmonella bacteria causing foodborne illness
Influenza virus
Lactobacillus used in yogurt fermentation
Baker’s yeast (Saccharomyces cerevisiae) used in bread making
Follow-up: Why should you not eat shellfish from water infected with toxins that result from red tide?
Shellfish from red tide waters taste bitter and spoil quickly
Shellfish can accumulate toxins that cause paralytic shellfish poisoning in humans
Red tide turns shellfish shells fragile, making them hard to cook
Shellfish from red tide waters have less protein and nutrients
Activity 4.9 — Guide Question: What causes red tide (algal bloom) in coastal waters?
Uncontrolled growth of dinoflagellates that accumulate and discolor the water
Increased feeding activity of fish during high tide
Regular tidal movements that stir up sediments
Oil spills that block sunlight from reaching the water
Activity 4.9 — Guide Question: What marine organisms commonly serve as hosts that concentrate red tide toxins?
Filter-feeding shellfish such as mussels, clams, and oysters
Fast-swimming predatory fish such as tuna and marlin
Seaweeds such as Sargassum and gulaman
Marine mammals such as dolphins and seals
Application: Based on what happens during red tide poisoning, which statement best explains how it affects the tahong (mussel) industry in the Philippines?
It increases mussel harvests because algae provide more food for tahong.
It temporarily halts harvesting because shellfish can accumulate toxins that make them unsafe to eat.
It has no effect on mussel farming because toxins only harm fish, not shellfish.
It lowers water clarity but does not change the safety of mussels for consumers.
Application: Identify the role of bacteria in the decomposition of organic matter.
They produce oxygen during photosynthesis.
They break down dead organic material into simpler substances that return nutrients to ecosystems.
They prevent any chemical changes in decaying matter.
They convert all organic matter directly into metal ions.
Application: Think of food processes that utilize bacteria.
Pasteurization of milk
Fermentation used to make yogurt and cheese
Boiling vegetables
Freezing meat
Guide Questions (Activity 4.10—Nitrogen-Fixing Bacteria): What was the shape of the bacteria that you observed?
Spherical or ovoid (cocci)
Rod-shaped (bacilli)
Spiral-shaped (spirillum)
Comma-shaped (vibrio)
Guide Questions (Activity 4.10—Nitrogen-Fixing Bacteria): Why are the bacteria in the nodule called nitrogen-fixing bacteria? Name two examples of nitrogen-fixing bacteria.
They make food by photosynthesis; examples include Staphylococcus and Streptococcus.
They convert atmospheric nitrogen into forms usable by plants; examples include Rhizobium and Azotobacter.
They digest starch in animal intestines; examples include Salmonella and Vibrio.
They decompose wood; examples include E. coli and Corynebacterium.
Guide Questions (Activity 4.10—Nitrogen-Fixing Bacteria): What is the importance of nitrogen to plants?
It is needed to form proteins and nucleic acids essential for growth.
It prevents plants from photosynthesizing.
It supplies plants with electricity.
It makes roots stop absorbing water.
Guide Questions (Activity 4.11—Human Diseases Caused by Bacteria, using the chart of bacterial diseases): Do all bacteria cause communicable diseases?
Yes; all bacteria are harmful and cause disease.
No; many bacteria are beneficial or harmless, and only certain species are pathogenic.
Only bacteria in water cause disease; bacteria on land do not.
Bacteria cause disease only during cold seasons.
Guide Questions (Activity 4.11—Human Diseases Caused by Bacteria, using the chart of bacterial diseases): In what kind of communities are the diseases listed in the chart more commonly found, and why?
In sparsely populated areas with abundant clean water, because exposure is minimal.
In communities with overcrowding and poor sanitation, because pathogens spread more easily through contaminated water, food, and close contact.
In isolated laboratory facilities, because strict hygiene increases pathogen growth.
In high-altitude towns, because thin air promotes bacterial reproduction.
Guide Questions (Activity 4.11—Human Diseases Caused by Bacteria, using the chart of bacterial diseases): How can these communicable diseases be prevented? Select all that apply.
Ensuring safe water and good sanitation
Vaccination when available
Practicing safe sex and proper hygiene
Avoiding any contact with all bacteria by staying indoors
Application (Activity 4.11): What steps should you follow if you want to study bacteria found in the human mouth?
Swab the mouth, prepare a smear on a glass slide, stain, and observe under a microscope.
Collect saliva in a sealed jar and leave it on a windowsill for a week.
Rinse with mouthwash, then examine the bottle label for bacterial names.
Chew sterile gum and assume no bacteria are present.
Activity 4.12 Identifying Fungi — Based on fresh fungi specimens such as mushrooms, tainagang daga, bread mold, and yeast, which description best states the general appearance of these specimens.
Filamentous hyphae forming a mycelium or single cells like yeast
Chlorophyll-rich green leaves with stems and roots
Segmented exoskeleton with jointed legs
Hard bony skeleton with vertebrae
Activity 4.12 Identifying Fungi — Considering common fungi specimens, in which places would you usually find these organisms.
Moist or decaying organic matter
Dry desert sand under intense sunlight
Inside metallic machinery
Floating in the upper atmosphere
Activity 4.13 Viral Diseases in Humans — What is the basic structure of the virus that causes each disease mentioned in the activity.
A core of RNA or DNA enclosed in a protein coat called a capsid
A cell with a nucleus, cytoplasm, and cell wall
A chloroplast-containing plant cell
A multicellular organism with tissues and organs
Activity 4.13 Viral Diseases in Humans — Which example describes an illness caused by viral infection mentioned among the activity topics.
Measles
Hypertension
Type 2 diabetes
Scurvy
Activity 4.13 Viral Diseases in Humans — Which measures help prevent or control the spread of viral diseases.
Vaccination when available
Frequent handwashing and proper hygiene
Safe sex practices and avoiding sharing needles
Sharing personal items to build immunity
