Organisms that evolved the ability to use H2O as a donor of electrons and hydrogen for the photosynthesis conversion of CO2 to organic compounds radically changed Earth by producing
a. sugar.
b. cellulose.
c. O2.
d. H2.
Ans: c. O2.
You might also like to view...
The diploid stage of the red algae life cycle is called:
a. sporophyte. b. zygote. c. gamete. d. gametophyte. e. haptophyte.
The simplest cephalization occurs in:
a. earthworms b. planarian flatworms c. jellyfish d. vertebrates e. grasshoppers
Sandy could be very disruptive in her first-grade class. She sometimes would scream and use foul language when she was frustrated; she mostly kept her hands to her side while interacting with her friends in the playground; and she would stare right
into the eyes of her teacher when he was explaining lessons. Her teacher, at his wit's end, complained to the principal that Sandy was autistic. Do you agree or disagree with the teacher? Explain your answer.
You are working to identify enhancer regions of a particular gene. The best place to look is
A. immediately upstream of the promoter. B. primarily downstream of the promoter, including the exons of the coding region. C. primarily upstream of the promoter, possibly some distance away. D. immediately downstream of the promoter.