I think it might be main clause?
During recent research, genetic researchers have isolated the gene that determines the natural times a person sleeps and wakes.
Here's the issues with the sentence:
"During recent research," doesn't match the tense of "genetic researchers have isolated."
"The natural times a person sleeps and wakes" is over explanatory, and should be simplified.
Research is repeated.
Answer: B. Genetic researchers recently isolated the gene that determines a person's natural sleep cycle.
Hope this helps!
Can you answer my question the gray and drop
Answer:
B.)No pleasant tale shall 'ere be told,
Nor things recounted done of old
Explanation:
Roger is timid in Thank you Ma'am because in the text, Roger was scared when the lady shook him when Roger was trying to steal her bag, Also, when she said buy a new pair of shoes to Roger, he immediately said yes, took the money and quickly went outdoors
I'm sorry if the 2nd reason is wrong because i do not have the text