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
Lyrx [107]
2 years ago
15

Which evolved first, photosynthesis or cellular respiration?

Biology
1 answer:
Readme [11.4K]2 years ago
6 0

Answer:

Because photosynthesis is a source of oxygen, it seems intuitive that photosynthesis evolved first: once enough O2 was in the air, then respiration would be able to arise in the newly oxygen-enriched atmosphere. However, some biologists have argued since the 1970's that respiration in fact evolved first.

You might be interested in
What is scientific method?
labwork [276]

Answer:

C

Explanation:

5 0
3 years ago
Enzymes work by ___?
Gennadij [26K]
<span>Enzymes work by reducing the energy of activation increasing the potential energy difference between reactant and product decreasing the potential energy difference between reactant and product adding energy to a reaction reducing EA adding a phosphate group to a reactant</span>
aka B
5 0
3 years ago
Read 2 more answers
Any three ways by which harmful subtances could contaiminate bod
saul85 [17]
Through a cut or an injury where any skin has been broken.

An infection through an animal's bite or sting.(Like the West Nile Virus which spreads though mosquito bite, or Rabies though an infected mammal's bite).

Can be inhaled or consumed and go from the lungs into the other organs causing harm internally.
  

4 0
3 years ago
Leaves attach to stems at nodes t or f
aleksandrvk [35]
True, all leaves at them stem calling the process "Nodes"
5 0
3 years ago
Which one is it ?!?
xeze [42]
White blood cell is the answer
6 0
3 years ago
Read 2 more answers
Other questions:
  • Convection in the upper mantle
    9·2 answers
  • Approximately how many molecules of ATP are produced from the complete oxidation of one molecule of glucose (C6H12O6) in aerobic
    8·2 answers
  • Oxycontin abusers are typically young white males. <br> a. True <br> b. False
    9·1 answer
  • Pleaaseee heeelp <br>explain the origin of the universe precedes the origin of life
    11·2 answers
  • Darwin drew ideas for his theiry from observations of organisms on
    11·1 answer
  • una bola en movimiento es golpeada por el bateador y cambia su dirección de movimiento. que ley de movimiento neutrón es.​
    12·1 answer
  • Describe at least two events during meiosis that increase the genetic diversity of the daughter cells produced.
    10·1 answer
  • Which type of plant makes up the largest group in the Plantae kingdom?
    8·1 answer
  • (If you copy and paste your answers from go.ogle you will not receive credit)
    13·1 answer
  • Describe the terms chromosomes, genes, alleles, and DNA in relation to heredity and to each other.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!