Thymine
The two strands are held together by hydrogen bonds between the bases, with adenine forming a base pair with thymine, and cytosine forming a base pair with guanine.
The classification system for organisms has changed from seven levels to eight. This happened because scientific consensus changed as scientists learned more about organisms.
The answer is B Adipose tissue.
We know that it cant be C or D
And A was wrong.
1. Made a lot of products cheaper and accessible
2. Many people moved from their (small farms and rural areas) into cities and earned a living as workers in factories
3. Women started to work in factories, instead of staying at home
