× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
e
4
h
4
h
4
m
3
d
3
B
3
o
3
w
3
H
3
a
3
c
3
k
3
Home Q & A Board Biology-Related Homework Help General Biology
New Topic  
jina jina
wrote...
Go to Answer
Posts: 441
Rep: 0 0
6 years ago
The oxygen needed by plants for metabolism is
  ultimately derived from
 
  a. aerobic respiration.
  b. photosynthesis.
  c. anaerobic respiration.
  d. the atmosphere.
  e. lightning discharges

Question 2

The decomposed, organic matter of soil is
 
  a. sand.
  b. clay.
  c. humus.
  d. silt.
  e. loam.
Read 54 times
1 Reply
Replies
Answer verified by a subject expert
madisonodommadisonodom
wrote...
#1
Posts: 378
Rep: 0 0
6 years ago
Sign in or Sign up in seconds to unlock everything for free
1

Related Topics

jina Author
wrote...

6 years ago
Just got PERFECT on my quiz
macbookpro1
wrote...

Yesterday
Brilliant ツ
nsak
wrote...

2 hours ago
Helped a lot
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1126 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Related Images
  
 293
  
 531
  
 570