Hey Kailey can someone help again!!! In a negative feedback loop, the initial signal is: Question 15 options:

remains unchanged

canceled out

amplified to a climax
WILL MARK BRAINLIEST

phylogenetic tree is the tree of life or evolution tree. it shows the different branches of evolution. the sequence goes like tissues - coelom - backbone - endoskeleton - segmentation

b c a d mark me

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

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