Answer:
B
Explanation:
negative feedback is used to regulate feedback
When Went placed the agar block on one side of the decapitated shoot, the shoot curved away from the agar as it grew. This demonstrated that some kind of hormonal signal had diffused into the agar from the coleoptile tips. ... Went's experiment represented the first time that anyone had isolated a hormone from plants.
Answer: The answer is B,C,D
Explanation: Because it’s right ;)
2 because the 1st energy level can only hold 2 electrons and the 2nd holds 4
