A person going to bed because she feels sleepy is an example of a(n)
_response to an stimulus.
O A) voluntary; internal
OB) voluntary, external
OC) involuntary; internal
OD) involuntary, external

creative diagnostics provides a protocol for total protein extraction based on ripa which is widely used.

if your own plato the answer is b. the fern transitioned from sporophyte generation to gametophyte generation.