Sorry this is biology, i need asap !

1). in what direction do particles naturally diffuse?

a). up concentration gradients
b). down concentration gradients
c). across concentration gradients
d). thought concentration gradients

2). what is the main difference between active and passive transport?

a). active transport involves molecules of gases: passive transport involves the molecule of lipuids

b). active transport takes place in plant cells: passive transport takes place in animal cells

c). active transport takes place in the bloodstream: passive transport takes place in cells

d). active transport requires a cell to use energy: passive transport does not

3). the cell membrane is important for because it controls what enters and leaves the cell.

a). shape
b). pressure
c). homeostasis
d). temperature

Acolleague from the plant in germany has arrived at the chicago plant to share insights on a recent product line changeover implemented in germany. this changeover has saved thousands of euros at the german facility, but jim does not think it will work in the united states. jim feels that there is a completely different attitude towards work and innovation in the u. s., and in fact, thinks the german facility is technologically behind his plant. additionally, the colleague often mispronounces words when he speaks english, and doesn't dress appropriately for the u. s. office. he showed up to work on the plant floor in a formal suit and tie, with dress shoes that had a slippery sole. however, the colleague is a guest, and it is important that jim pretends to be interested. identify the listening barriers. check all that apply. thought speed grandstanding faking attention nonverbal distractions psychological barriers