1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
valentina_108 [34]
3 years ago
10

Students are testing the james river for dissolved-oxygen levels. They test in the blue ridge mountains,at the rivers source,and

in Richmond Virginia,a highly populated area. What is the independent variable in this experiment?
Biology
2 answers:
iogann1982 [59]3 years ago
5 0

Answer: 21 holes

Explanation:

Yes

kykrilka [37]3 years ago
3 0
The oxygen levels I think
You might be interested in
An amino acid molecule includes a central carbon atom bonded to _____, a carboxyl group, and a hydrogen atom
pishuonlain [190]
A central carbon atom bonded to an amino acid group and an R group.  
8 0
3 years ago
Read 2 more answers
Describe the process by which coral polyps and algae create a coral reef.
xenn [34]
Coral reefs are built by coral polyps as they secrete layers of calcium carbonate beneath their bodies.  And inside each coral poly lives single-celled algae called zooxanthellae. So basically in simplistic terms, coral polys create coral reefs and algae is in coral polys which also goes into coral reefs when they are made. 
3 0
3 years ago
Is acid rain causing a decline of frog population? (variables/scientific method)
Oksi-84 [34.3K]
Yes. Acid rain destroys frog’s and tadpoles’ (young frogs) habitat of lakes and depletes oxygen supply in the lakes.
6 0
3 years ago
An atom of element A has 64 protons. What would the element's atomic number be?
Lera25 [3.4K]
Protons are equal to atomic number. Meaning the answer would be 64.
6 0
2 years ago
What organelles have evolved through endosymbiosis?
Mademuasel [1]
<h3>Answer:</h3><h3>Mitochondria and chloroplasts originated from the endosymbiotic association of aerobic (more...) A critical step in the evolution of eukaryotic cells was the acquisition of membrane-enclosed subcellular organelles, allowing the development of the complexity characteristic of these cells.</h3><h3>Hope this is fine for you </h3>
7 0
3 years ago
Read 2 more answers
Other questions:
  • Cardiac muscles
    13·1 answer
  • Why are sex-linked traits more common in males than in females?
    11·1 answer
  • Genes are unable to determine a person's
    9·1 answer
  • Why consumers would want GMO?
    15·1 answer
  • In which two places do divergent boundaries occur?
    11·2 answers
  • Carbon dioxide is used by plankton during photosynthesis to make organic molecules containing ( lead / carbon / argon / chlorine
    8·1 answer
  • Which word describes the process by which a human transmits a disease to an animal?
    6·2 answers
  • Function of epiglottis​
    8·1 answer
  • How do lipids make ATP?
    5·1 answer
  • Which molecule is needed for photosynthesis to occur?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!