The primitive earth's atmosphere did NOT contain
a. water vapor.
b. free nitrogen.
c. free hydrogen.
d. free oxygen.
e. inert gases.
D
You might also like to view...
A(n) ________ is a group of sequentially interacting proteins important in innate and adaptive immunity
A) complement B) opsonin C) inflammation D) regeneration
The main danger from deep vein thrombosis is ____
a. a clot breaking loose and moving elsewhere in the body b. unsightly veins c. loss of blood flow in the extremities d. blood pooling below the heart e. a clot dispersing without warning
Which are typically used for positional cloning of a disease gene in humans? (Select all that apply.)
A) analysis of several human pedigrees in which the disease is segregating B) genotyping of diseased and healthy individuals at millions of anonymous polymorphisms using microarrays C) sequencing candidate genes D) a multigenerational selective breeding program
Many sponges produce both eggs and sperm and thus are
a. monoecious. b. dioecious. c. hermaphroditic. d. both a and c.