× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
a
5
k
5
c
5
B
5
l
5
C
4
s
4
a
4
t
4
i
4
r
4
r
4
Home Q & A Board Biology-Related Homework Help Cell Biology
New Topic  
Linhlinh Linhlinh
wrote...
Go to Answer
Posts: 740
Rep: 0 0
6 years ago
PCR was invented in _______.
 
  (a) the 1800s.
  (b) the 1950s.
  (c) the 1980s.
  (d) 2009.
Read 21 times
1 Reply
Replies
Answer verified by a subject expert
Harley0507Harley0507
wrote...
#1
Top Poster
Posts: 879
Rep: 8 0
6 years ago
Sign in or Sign up in seconds to unlock everything for free
1

Related Topics

Linhlinh Author
wrote...

6 years ago
this is exactly what I needed
ezsancheezy
wrote...

Yesterday
Thank you, thank you, thank you!
ealvino1610
wrote...

2 hours ago
Brilliant ツ
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1254 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 658
  
 672
  
 264
Your Opinion
Who will win the 2024 president election?
Votes: 3
Closes: November 4
Previous poll results: Which is the best fuel for late night cramming?