IGCSE O Level Biology Practice Test 298

Causes of Pollution: Biology MCQs (Multiple Choice Questions) PDF Download - 298

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The MCQ Quiz: Pollutants from natural cause can; "Causes of Pollution: Biology" App (Android & iOS) with answers: Not avoided no matter what precautions are taken; Avoided if proper precautions are taken; Recycled; Stored; to study online courses. Practice Effects of Human Activity on Ecosystem Questions and Answers, Google eBook to download free sample for online college classes.

Causes of Pollution: Biology MCQ with Answers PDF Download: Quiz 298

MCQ 1486:

Pollutants from natural cause can

avoided if proper precautions are taken
not avoided no matter what precautions are taken
recycled
stored

MCQ 1487:

The enzyme, Papain is found in

pawpaw
proteases
pepsin
pancreatic amylase

MCQ 1488:

Water molecule (H₂O) is split into hydrogen (H₂) and oxygen (O₂) when

larynx is lowered, glottis is open
larynx is lowered and the windpipe is opened
larynx is raised and epiglottis blocks glottis
larynx is raised and pharynx is shut

MCQ 1489:

Fats acts as a solvent for

protoplasm
fat-soluble vitamins
insulating materials
mineral ions (Ca⁺², Na⁺, K⁺, Mg⁺²)

MCQ 1490:

Gland referred to as "Master gland" is

Pituitary gland
Adrenal gland
thyroid gland
islets of Langerhans

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