The early Earth reducing atmosphere is thought to have lacked which of the following gases?
A. H2O
B. O2
C. SO4
D. CO2
E. N2
Answer: B
You might also like to view...
Which are reasons for the Cambrian Explosion? Check all that apply.
_____ increased oxygen. _____ Hox genes. _____ mammalian dominance. _____ increased ozone. _____ coevolution of predator and prey.
An endergonic reaction can proceed only if it absorbs:a
randomly available free energy. b. less free energy than is released by a coupled exergonic reaction. c. more free energy than is released by a coupled exergonic reaction. d. less free energy than is released by a coupled endergonic reaction. e. the same amount of free energy that is absorbed by the enzymatic breakdown of proteins.
How can DNA tell you how closely related two organisms are?
What will be an ideal response?
Pasteur's research on anthrax and rabies contributed to the development of the field of epidemiology/immunology/etiology)
What will be an ideal response?