Your little brother has a habit of pestering you whenever you sit down to study, so you start one of his favorite videos to keep him occupied while you study and are pleased to note that it does, indeed, stop the pestering. Over time, you find yourself starting videos
more and more for him when you want to study or do other activities without interruption from him. This suggests that, for you, the
behavior of starting a video for your little brother has been
O positively reinforced
O positively punished
O negatively reinforced
O negatively punished

Positively reinforced

Explanation:

You are rewarding him for bothering you so its reinforcing it and giving him a good thing so positively

id say Positively punished, if it was reinforced it wouldve meant that (positive) he did something good to get that reward, (negative) he wouldve gotten something taken away. hope this helps! :)

Explanation:

the answers are as following:

1. c. double helix, nucleosome, coil, supercoil, chromosome

2. b. g2 phase, preparation for mitosis

3. d. interphase consists of the g1, s, and g2 phases

4. c. metaphase

5. a. chromosomes are duplicated before cell division so that each new daughter cell has a complete set