Which one of the following enabled plants to spread across the land?
A. the increase in atmospheric oxygen
B. the co-evolution of fungi
C. the presence of bulk transport systems
D. the evolution of new photosynthetic
pathways
C
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In the genus Caulobacter, asymmetric transverse fission produces a flagellated ________ cell that swims off but eventually settles, ejects its flagella, and forms a ________ that adheres to surfaces.
Fill in the blank(s) with the appropriate word(s).
Inactive Ras is bound to receptor tyrosine kinases by ____
a. G proteins b. adapter proteins c. phosphate bonds d. peptide tethers e. GDP
A mountain rain shadow "falls" on the:
a. arid area on the windward slope b. wet area on the windward slope c. arid area on the leeward slope d. wet area on the leeward slope e. arid area on both slope
The two greatest reasons for the increasing demand for power are:
A. reduced efficiency in appliances B. population growth C. relaxation of government regulations D. increased consumption E. reduced resources F. global warming G. hole in ozone layer