Respiratory + Circulatory
What structure carries air from the nose and mouth into the lungs?
Trachea
Why is hydration important for the circulatory system?
It keeps blood flowing smoothly and prevents clotting.
Which inheritance pattern shows both alleles equally, like type AB blood?
Codominance
What is the main cause of extinction in most species today?
Human activities
What is the main product of photosynthesis used as food by plants?
Glucose
What blood vessels return oxygen-poor blood to the heart?
Veins
What daily habit keeps the respiratory system clear of harmful particles?
Avoiding smoking / staying in clean air
What inheritance pattern is shown when neither allele is dominant, producing a blend?
Incomplete dominance
What do we call the change in structure or behavior that helps organisms fit their environment?
Adaptation
In what organelle does photosynthesis occur?
Chloroplast
What happens to oxygen when it reaches the alveoli?
It diffuses into the blood and binds with red blood cells.
How does regular aerobic exercise (e.g., jogging) improve heart health?
It strengthens the heart muscle and increases blood circulation.
Human blood type inheritance is an example of what pattern?
Multiple Alleles
Give one human activity that can cause species extinction.
Deforestation, overhunting, pollution, or mining
How is respiration different from photosynthesis in terms of energy?
Photosynthesis stores energy in glucose, while respiration releases energy from glucose.
Why does the circulatory system need the respiratory system?
To supply oxygen and remove carbon dioxide for cell function.
What is one possible effect of eating too much fast food on the circulatory system?
Build-up of cholesterol leading to hypertension or heart disease.
Hemophilia is passed to male heirs because the defective gene is found on which chromosome?
X- chromosome
Why does low genetic diversity make a species more vulnerable to extinction?
It limits the ability of the population to adapt to environmental changes.
Why is photosynthesis important for animals as well as plants?
It produces oxygen and food that animals depend on.
Describe the pathway of oxygen from inhalation to being used by body cells.
Nose → Trachea → Bronchi → Alveoli → Bloodstream → Heart → Body cells
Explain how stress management can improve both respiratory and circulatory health.
It lowers blood pressure, normalizes breathing, and reduces strain on heart and lungs.
A mother with hemophilia passes the gene to her son. What inheritance pattern is shown?
Sex-linked inheritance (X-linked)
How does climate change contribute to species extinction?
Rapid changes in temperature and habitat disrupt ecosystems, and species unable to adapt die out.
Explain how photosynthesis and respiration are interdependent.
The products of photosynthesis (glucose, oxygen) are used in respiration, while the products of respiration (carbon dioxide, water) are used in photosynthesis.