Characteristics of Life
Which characteristic refers to the fact that living things are made of basic building blocks of life, while non-living things are not?
A) Cellular Structure
B) Metabolism
C) Reproduction
D) Growth & Development
A) Cellular Structure
Maya eats yogurt for breakfast. The tiny bacteria in the yogurt break down her
food for energy. What kind of bacteria are these?
A) Helpful Bacteria
B) Neutral Bacteria
C) Harmful Bacteria
Helpful Bacteria
When poor hygiene allows bacteria to grow in moist areas like the feet or groin, what immune system component responds locally in the dermal layers?
A) Red blood cells carrying oxygen to suffocate the bacteria.
B) Mast cells releasing histamine, causing localized vasodilation, redness, and swelling as white blood cells rush to fight the microbial load.
C) Bone marrow producing calcium deposits to trap the bacteria.
B) Mast cells releasing histamine, causing localized vasodilation, redness, and swelling as white blood cells rush to fight the microbial load.
What is the main job of your lungs when you breathe?
A) To pump blood all around your body
B) To take in oxygen from the air and push out carbon dioxide
C) To digest the food you eat for energy
To take in oxygen from the air and push out carbon dioxide
How does your brain help your respiratory system when you are running or playing hard?
A) It tells your lungs to breathe faster so your cells get more oxygen.
B) It tells your lungs to stop breathing completely.
C) It turns off your mitochondria so you don't get tired.
A) It tells your lungs to breathe faster so your cells get more oxygen.
A rock remains the same size for thousands of years, but a sapling turns into a
large tree. Which characteristic does this describe?
A) Response to Stimuli
B) Growth & Development
C) Reproduction
D) Cellular Structure
B) Growth & Development
Leo ate meat left on the counter all day. Now his tummy hurts really bad and he
feels sick! What kind of bacteria caused this?
A) Neutral Bacteria
B) Helpful Bacteria
C) Harmful Bacteria
C) Harmful Bacteria
How does chronic poor hygiene and persistent low-grade skin infection affect the body's overall immune system efficiency?
A) It keeps the immune system in a state of continuous activation, which can divert vital immunological resources from other systemic challenges.
B) It permanently shuts down the production of red blood cells within 24 hours.
C) It forces the lymphatic system to bypass the spleen and turn into a digestive organ.
A) It keeps the immune system in a state of continuous activation, which can divert vital immunological resources from other systemic challenges.
When your body is working just right, where does the oxygen from your lungs go next?
A) Straight into your stomach
B) Into your blood so it can travel to all your cells
C) Out through your skin as sweat
B) Into your blood so it can travel to all your cells
22. How do the overall body systems (respiratory & circulatory) connect to the tiny cellular subsystem?
A) They deliver fuel (O2 & food) right to cells so mitochondria can make ATP.
B) They have nothing to do with what happens inside the cells.
C) They collect waste from the cells and store it inside your bones forever.
A) They deliver fuel (O2 & food) right to cells so mitochondria can make ATP.
Living things are able to create offspring or more of their own kind. What is this
process called?
A) Growth & Development
B) Metabolism
C) Response to Stimuli
D) Reproduction
D) Reproduction
"Bob" lives in Sarah's gut. Bob doesn't make Sarah sick, but doesn't help digest
food either—he just takes up space. What kind of bacteria is Bob?
A) Helpful Bacteria
B) Harmful Bacteria
C) Neutral Bacteria
C) Neutral Bacteria
Why is maintaining personal cleanliness critical in community environments regarding barrier defenses?
A) Clean skin and fresh clothing minimize the transmission vector of transient pathogens between individuals, protecting both personal barrier defenses and public health.
B) Clean clothes create an electrostatic force field that repels all airborne microorganisms on contact.
C) Personal cleanliness completely eliminates the need for white blood cells and lymphatic tissues.
A) Clean skin and fresh clothing minimize the transmission vector of transient pathogens between individuals, protecting both personal barrier defenses and public health.
What tiny part inside your cells acts like a power plant to turn food and oxygen into energy?
A) The mitochondria
B) The brain
C) The bones
A) The mitochondria
23. What happens if your body system is properly regulating gas exchange?
A) You get too much carbon dioxide trapped in your fingers.
B) Cells get the right oxygen to make energy, and waste gases are removed smoothly.
C) Your lungs stop working because they don't need oxygen anymore.
B) Cells get the right oxygen to make energy, and waste gases are removed smoothly.
Plants use sunlight and animals eat food to get energy for life processes like
respiration. Which characteristic does this demonstrate?
A) Cellular Structure
B) Growth & Development
C) Metabolism
D) Response to Stimuli
C) Metabolism
Bacteria in David's belly act like superheroes fighting off bad germs so David stays
healthy. What kind of bacteria are these?
A) Helpful Bacteria
B) Neutral Bacteria
C) Harmful Bacteria
A) Helpful Bacteria
Which of the following best explains why failing to wash athletic gear or clothes can lead to persistent skin infections like folliculitis?
A) Fabrics act as fomites that repeatedly reintroduce trapped sweat, dead skin cells, and accumulated pathogens to friction-compromised skin barriers.
B) Dirty clothes emit magnetic fields that attract airborne viruses directly into open skin pores.
C) Fabric fibers chemically mutate harmless resident skin cells into invasive fungal spores.
A) Fabrics act as fomites that repeatedly reintroduce trapped sweat, dead skin cells, and accumulated pathogens to friction-compromised skin barriers.
What is ATP?
A) A type of waste gas that your body breathes out
B) The energy currency that your cells use to do work and keep moving
C) A muscle in your chest that helps you breathe
B) The energy currency that your cells use to do work and keep moving
What material does the cell get rid of?
A) ATP
B) H2O
C) the mitochondria
B) H20
A plant bends towards the sunlight and you pull your hand away from a hot stove.
Both are examples of which characteristic?
A) Response to Stimuli
B) Reproduction
C) Metabolism
D) Cellular Structure
A) Response to Stimuli
Emma ate an apple without washing her hands and swallowed dirty germs,
resulting in a fever. What kind of bacteria were on her hands?
A) Neutral Bacteria
B) Helpful Bacteria
C) Harmful Bacteria
C) Harmful Bacteria
In the context of respiratory and skin health, why does wearing freshly laundered clothes contribute to overall homeostasis?
A) Clean fabrics remove accumulated microbial loads, allergens, and chemical residues that could otherwise disrupt the skin microbiome and trigger inflammation.
B) Fresh clothes inject essential vitamins directly into the bloodstream through dermal pores.
C) Clean clothes automatically increase internal body temperature to destroy viruses.
A) Clean fabrics remove accumulated microbial loads, allergens, and chemical residues that could otherwise disrupt the skin microbiome and trigger inflammation.
Which gas is a waste product that your cells make and your lungs push out of your body?
A) Oxygen (O2)
B) Carbon dioxide (CO2)
C) Water vapor
B) Carbon dioxide (CO2)
How does the cell make ATP?
A) it uses carbon dioxide and sodium
B) it uses sodium and glucose
C) it uses glucose and oxygen
C) it uses glucose and oxygen