Top Posters
Since Sunday
t
7
m
6
k
6
F
5
j
5
t
5
j
5
G
5
f
5
a
5
d
5
c
5
New Topic  
barry barry
wrote...
Posts: 11630
10 years ago
The "tanning" effect (darkening of the skin) that occurs when a person is exposed to the sun is due to:
A) melanin
B) keratin
C) oil
D) Langerhans cells
E) sweat
Read 1739 times
2 Replies
Replies
Answer accepted by topic starter
cheap.tb.solncheap.tb.soln
wrote...
Donated
Posts: 286
10 years ago
Sign in or Sign up in seconds to unlock everything for free

Related Topics

barry Author
wrote...
10 years ago
Thanks.
New Topic      
Explore
Post your homework questions and get free online help from our incredible volunteers
  801 People Browsing
Related Images
  
 277
  
 541
  
 240
Your Opinion
Who's your favorite biologist?
Votes: 587

Previous poll results: Do you believe in global warming?