Read aloud
Instruction:
Look at the text below. In 40 seconds, you must read this text aloud as naturally and as clearly as possible. You have 40 seconds to read aloud.
DNA molecule
Usually, age is determined by physical characteristics, such as teeth or bones. Great- if you have a body. Researchers have tried successfully to use blood. But in this study, the scientists used immune cells called T-cells recognize invaders through receptors that match molecules on bacteria, viruses even tumors. The cellular activity that produces these receptors also produces a type of circular DNA molecule as a byproduct.
A
0/0
AnswersDiscussion
Frequency:
Source:
Order: