GE9_U4_VOCAB

People who are (a)   (unable to distinguish certain colours – synonym: colour-deficient) may confuse red and green.

Answer explanation

Explanation for the answer (optional)

The retina contains rods and (a)   (light-sensitive cells responsible for colour vision – synonym: photoreceptors).

Plants need (a)   (form of energy that makes vision possible – synonym: illumination) to grow.

The skin has a special (a)   (cell that receives signals – synonym: sensor) for touch and temperature.

The (a)   (light-sensitive layer at the back of the eye – synonym: eye membrane) helps form visual images.

This painting uses a soft (a)   (a slight variation of colour – synonym: tone) of blue.

Poor sanitation can lead to outbreaks of (a)   (an infectious disease causing severe diarrhea – synonym: intestinal infection).

The global pandemic known as (a)   (a viral respiratory illness – synonym: coronavirus disease) began in 2019.

(a)   (a contagious viral illness – synonym: flu) spreads easily during winter.

(a)   (Middle East Respiratory Syndrome – synonym: viral infection) affected several countries in 2012.