cdna

"While walking to school, Sarah found a lost wallet on the ground. "

"The reverse of a failing grade is a passing grade. "

"You can create the color orange by mixing yellow and red."

"Scientists study plants to understand how they grow. "

""In art class, we learned that blue is a complementary colour to orange." "

"The messenger delivered the important letter to the teacher. "

"My sister's joyful expression showed how happy she was about the good news. "

"In a biology lab, scientists studied how transcriptase helps viruses replicate. "

"BBC is an initialism for British Broadcasting Corporation."

"I need to study my biology notes."

"You can create the color orange by mixing yellow and red."

"Researchers are studying the effects of exercise on mental health. "