Which of the below is not an example of an ecosystem service?
a. pollination of crops by native bees
b. revenue generated by clear-cutting of tropical dry forest
c. the presence of an intact forest maintaining constant water flow in streams throughout the dry season in a tropical region
d. rainforest trees removing carbon from the atmosphere

Guard cells control which event? the growth of plants capture of solar energy gas exchange in leaves water absorption in roots

What does the positioning of transcription factors determine?

Ras is a g-protein that is activated when a growth factor attaches to egfr. its activation results in the replacement of a gdp molecule with a gtp molecule, thus allowing a signal transduction pathway to be activated. considering the signal pathway illustrated on this page, what is one potential outcome of a mutation in the ras gene that leads to ras protein hyperactivity. be specific.