The atmosphere became rich with oxygen due to the activity of:
A) plants
B) bacteria
C) eukaryotes
D) cyanobacteria
E) multicellular animals
Ans: D) cyanobacteria
You might also like to view...
Groups of cells that work together to provide a specific function are called
A. tissues. B. organs. C. organelles. D. tumors. E. organ systems.
Glomerular capillary walls and podocytes form a __________ that allows fluid and small solutes in
plasma to pass through and become part of the filtrate. a. glomerular filtrate b. tubular transport c. renal threshold d. filtration membrane e. filtration slits
Negatively charged subatomic particles that have almost no mass are called
A. polymers. B. neutrons. C. ions. D. electrons. E. protons.
A sample of the tissue from an inflamed, pus-filled area on the lower leg is treated with KOH and stained with GMS. Under the microscope golden brown spheres are visible. With what disease are these observations consistent?
A) pityriasis B) fungemia C) chromoblastomycosis D) mycetoma E) sporotrichosis