IGCSE O Level Biology Online Tests
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Ordinary Level Biology MCQs PDF: Questions Answers Download
Carbon dioxide (CO2) is released in the atmosphere through
- respiration
- combustion
- decay
- all of above
In plants the term hydrophonics refers to growing
- plants without soil
- plants in air
- plants in soil
- plants in water
Enzyme 'Enterokinase' is found in
- saliva
- gastric Juice
- pancreatic Juice
- intestinal juice
Caseinogen is a form of
- soluble milk proteins
- insoluble milk proteins
- cellulose
- proteins
Carbon (C) requirements are met through organic compounds in
- autotrophic nutrition
- photoautotrophic nutrition
- chemoautotrophs
- heterotrophic nutrition
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