Cells know how to differentiate through a process called gene expression. It’s a specific combination of genes that are turned on and off.
Answer:
social anxiety disorder
Explanation:
social anxiety disorder is the fear of being judged by people or negatively assessing them, or rejected in a social situation
Answer:
Around 4.1 billion years ago, the first single celled life form appeared on Earth
Answer:
In order for pregnancy to happen, sperm needs to meet up with an egg.
The gene for beta-galactosides turns on
