Answer:
Epithelial cells
Explanation:
Epithelial cells act as a barrier to invading cells and viruses.
It lines the tissues of blood vessels in order to keep blood flowing and keeping you healthy.
Answer:
I believe its Scientific Method
Explanation:
Cats can bite you if they're playing or just want alone time to them selfs. Plus if they think you are going to do harm to them.
Hope this helps! :D
<h3>To round to a significant figure:</h3>
- look at the first non-zero digit if rounding to one significant figure.
- look at the digit after the first non-zero digit if rounding to two significant figures.
- draw a vertical line after the place value digit that is required.
- look at the next digit.
