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
AysviL [449]
4 years ago
5

The element was poisonous to the first forms of life on earth until they evolved to take advantage of it by using cellular respi

ration. What is it? A. Hydrogen B. Nitrogen C. Oxygen D. Sulfur
Biology
1 answer:
Svetradugi [14.3K]4 years ago
6 0
The correct answer is C, oxygen. Oxygen was once harmful and used to cause harm to the DNA in primitive organisms. 
Later on, the bacteria developed enzymes that prevented their DNA from damaging action of oxygen. Afterward, they evolved to use it for cellular respiration. 
You might be interested in
Which of the following planets has the largest orbital radius compared to the others?
Alex_Xolod [135]
Hey there!

The correct answer to your question will be the third option.
Saturn is the planet that has the largest orbital radius compared to the others. 
Saturn is also the sixth planet away from the sun.
<span>
</span>
Hope this helps you.
Have a great day! :)
7 0
4 years ago
Read 2 more answers
Is butress root tap root or fibrous?
diamong [38]

In most trees and wildflowers, one root, the taproot, is more prominent than the other fibrous roots. The taproot is usually relatively large in diameter and extends more deeply than the plant's other roots, and often has additional lateral roots.

7 0
3 years ago
Read 2 more answers
You never have to worry about wastewater becoming contaminated because it can run through local treatment plants, true or false?
ddd [48]
Water does go threw water treatments to treat water so I’ll say true
3 0
4 years ago
What is used to indicate the flow of energy in a food chain or web ​
sergeinik [125]

Answer: Primary Consumers (eat producers) The arrows in a food chain show the flow of energy, from the sun or hydrothermal vent to a top predator. As the energy flows from organism to organism, energy is lost at each step. A network of many food chains is called a food web.

4 0
3 years ago
What is the answer??
salantis [7]

Answer:

1

Explanation:

6 0
3 years ago
Other questions:
  • First one to answer will get brainliest
    14·1 answer
  • What is the name of the literary element used to give human attributes to animals?
    9·1 answer
  • The scientist credited with being the first person to observe bacteria is
    12·1 answer
  • scientist is studying a unicellular organism. The organism normally looks like image A. Then the scientist places the cell in tw
    10·1 answer
  • Match the field of science with the correct description. 1. relationship between plants, animals, and the environment geology 2.
    10·1 answer
  • Within any food web, the organism in the picture is considered a(n)
    10·2 answers
  • Which process does the plant need energry to perform​
    14·2 answers
  • What consists of three stages
    5·1 answer
  • A child with brown eyes inherited a brown-eyed gene from one parent and a blue-eyed gene from the other parent. Which of these d
    5·1 answer
  • What is the key difference between photoheterotrophs and photoautotrophs?.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!