Science MCQs

Inhalers deliver medication to open airways during an asthma attack.

Biomedical engineers create artificial organs and medical devices.

Transpiration pull draws water up the xylem against gravity.

Pressure Flow Hypothesis explains sap movement in phloem.

Veins (midrib and smaller veins) contain vascular tissues for transport.

Blocked stomata prevent gas exchange needed for photosynthesis and transpiration.

Transpiration releases water vapor cooling the surrounding air.

Brain transplants are not performed; kidneys hearts livers and lungs are commonly transplanted.

Phloem transports sugars and other organic compounds.

Valves ensure blood flows in one direction preventing backflow.