× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
6
y
2
m
2
m
2
u
2
m
2
B
2
M
2
e
2
k
2
N
2
y
2
New Topic  
lacoya15 lacoya15
wrote...
Posts: 662
Rep: 0 0
6 years ago
Photosynthetic bacteria which do not use water as the ultimate source of electrons
 a. only contain chlorophyll a.
  b. only contain chlorophyll b.
  c. do not produce oxygen.
  d. have two photosystems.
  e. none of these
Read 91 times
1 Reply
Replies
Answer verified by a subject expert
bethclipbethclip
wrote...
Top Poster
Posts: 873
Rep: 4 0
6 years ago
Sign in or Sign up in seconds to unlock everything for free
1

Related Topics

lacoya15 Author
wrote...

6 years ago
Thank you, thank you, thank you!
wrote...

Yesterday
Smart ... Thanks!
wrote...

2 hours ago
This helped my grade so much Perfect
New Topic      
Explore
Post your homework questions and get free online help from our incredible volunteers
  583 People Browsing
Related Images
  
 203
  
 250
  
 811
Your Opinion
Which 'study break' activity do you find most distracting?
Votes: 824