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What condition would have made the primitiveatmosphere of Earth more conducive to the origin of life than thepresent one? The primitive atmosphere
a. had a layerof ozone that shielded the first fragile cells. b. removedelectrons that impeded the formation of protobionts. c. may have beena reducing one that facilitated the formation of complex substancesfrom simple molecules. d. had moreoxygen than the modern atmosphere, and thus it successfullysustained the first living organisms. e. had less freeenergy than the modern atmosphere, and thus newly formed organismswere less likely to be destroyed.
spider crabs live in shallow areas of the ocean floor and greenish-brown algae lives on the crabs backs making the
Why does fermentation preserve foods and why would a farmer purchase Rhizobium? Bacillus thuringiensis - most of the world's population relies on wheat for food.
though , the addition of a trace of uniformly labeled [14C]acetyl-CoA in the presence of an excess of unlabeled malonyl-CoA to a soluble liver fraction yields palmitate labeled with 14C only in C-15 and C-16.
How is a new copy of DNA elongated? List three keyproteins involved and explain their function. Mention leading and lagging strands and explainthe difference. How are the lagging strands connected?
in rabbits black fur is dominant to brown and long hair is dominant to short hair. a male is mated to several brown
Mr. and Mrs. Jackson have three children. Each of the three is found to have a different blood type. Sarah is type O, John is type A, while Joe is type B. What are the blood type phenotypes and genotypes of Mr. and Mrs. Jackson?
List and explain at least three cellular features of bacteria that might be targeted to inhibit or kill a bacterial pathogen.
A white-fruited squash plant when crossed with a yellow-fruited one produces offspring about half of which are white and half yellow. What are the genotypes of the parents?
q1. some organizations as in the ecological society of america are starting to envision a sustainable society-one in
Noah is a technician assigned to photograph chromosomes. At what stage of the cell cycle are the chromosomes sufficiently condensed that they FIRST become visible under light microscope.
Compare the spliceosome to the ribosome. What general features do they share in terms of their structure, their components, and their activity? How do they differ?
Hermione is NEITHER affected by NOR a carrier of alkaptonuria an autosomal recessive metabolic disorder. She is, however, a carrier for hemophilia.
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