Photosynthesis
Where is food produced in a plant?
Food is produced in the green parts of the plant.
How do all animals, fungi, and many bacteria get their nutrition?
By consuming other organisms.
How do plants contribute to the oxygen we breathe?
They release oxygen as a byproduct of photosynthesis.
Where does digestion begin?
In the mouth.
What is a secondary consumer?
A secondary consumer is an organism that gets its energy by feeding on primary consumers.
What is photosynthesis?
The process by which plants use sunlight, water, and carbon dioxide to make food (glucose) and oxygen.
What is the main energy source for all living things?
The Sun (directly or indirectly).
How do animals contribute to the carbon dioxide-oxygen cycle?
By breathing in oxygen and releasing carbon dioxide through respiration.
What does saliva do?
Helps break down food chemically.
What is a heterotroph?
An organism that must eat other organisms for energy (e.g., humans, animals).
What are the raw materials needed for photosynthesis?
Sunlight, water (H₂O), and carbon dioxide (CO₂).
Why do humans need a digestive system?
To break down food and absorb nutrients.
What two gases are involved in the carbon dioxide-oxygen cycle?
Carbon dioxide (CO₂) and oxygen (O₂).
What is food called before swallowing?
A bolus.
What is a multicellular organism? Give an example
An organism composed of many cells. Examples of a multicellular organisms are humans, plants, insects, algae, etc.
What type of organism can perform photosynthesis?
Producers or autotrophs (e.g., plants).
How do plants and animals differ in how they get energy?
Plants make their own food through photosynthesis; animals eat other organisms.
Why is the carbon dioxide-oxygen cycle important for the biosphere?
It maintains the balance of gases needed for life on Earth.
Where does the last part of digestion take place?
The large intestine.
What does the term "chlorophyll" mean?
Explain how photosynthesis supports life on Earth.
It provides food (energy) for plants and oxygen for animals and humans to breathe.
What are the two reasons that food is important?
1) It provides the building blocks for growth, development, and system repair.
2) It is the sources of energy that organisms need to live.
Describe the full oxygen-carbon dioxide cycle between plants and animals.
Plants take in CO₂ and release O₂ through photosynthesis; animals take in O₂ and release CO₂ through respiration.
Why is the mouth important in the digestive system?
It starts digestion by mechanically breaking down food with teeth and chemically with saliva.
What is a capillary and what is its function in the digestive system?
The smallest blood vessel. Gases, nutrients, and wasters are exchanged between capillaries and cells.