Related Clues:
- Bit on a book jacket
- A few lines on one's Twitter profile, say
- Certain lab subject
- Chemistry prefix
- Summary usually including a photo
- eharmony profile part
- 'About the author' info
- Book jacket part, in brief
- Tough high school sci. course
- Challenging H.S. sci. class
- Dating app blurb
- Part of a dating profile, for short
- Twitter profile blurb
- Starter for science and safety
- Sci. that studies cells