Describe prokaryotic cells and discuss the role they played in early Earth. What will be an ideal response?
A prokaryotic cell lacks a nucleus and organelles such as mitochondria and plastids. Bacteria
and archaea are examples of prokaryotic cells. The early photosynthetic organisms, including
cyanobacteria, were prokaryotic. They played an important role in the change in the
atmosphere from oxygen-poor to oxygen-rich. Mound-like stromatolites are the result of
captured sedimentary particles by the filaments of these prokaryotic bacteria.
You might also like to view...
Lake-effect snows
A) are enhanced by a large fetch. B) are most common in late spring. C) are caused by mT air masses. D) result in snowbelts on the north sides of the Great Lakes. E) all of the above
Which one of the following gases has the greatest effect on weather?
A) ozone B) water vapor C) oxygen D) argon E) nitrogen
Predict what is presently happening to the mass balance of glaciers in the northern hemisphere.
A. Mass balance is staying the same B. Mass balance is increasing C. Mass balance is decreasing
The problem of pollution arises in primarily ______________ economies around the world.
A. command-oriented B. market-oriented C. middle income D. both a and b