Chose the FALSE statement: When molecules are going WITH the concentration gradient...

A. they are moving by passive transport

B. they may be going right through the membrane

C. they may be going through protein tunnels

D. ATP is needed to make this happen

Which image shows labeled organelles that are present only in plant cells?

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.

Which of the following is not associated with invasive species?