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
Artemon [7]
3 years ago
11

Oxygen was initially created in Earth's atmosphere by _____. volcanoes outgassing cyanobacteria photosynthesizing greenhouse eff

ect Ozone breaking down
Biology
2 answers:
VikaD [51]3 years ago
7 0

The answer might be Cyanobacteria photosynthesizing

SCORPION-xisa [38]3 years ago
6 0

The correct answer is B. Cyanobacteria photosynthesizing

Explanation:

Oxygen is a chemical element necessary for most life forms to exist, this includes most animals as they require oxygen for multiple body functions. This element is nowadays one of the most abundant elements in the atmosphere and due to this, life forms are abundant and diverse; however, before photosynthetic organisms oxygen was not part of the Earth's atmosphere. This can be explained as organisms that rely on photosynthesis, use carbon dioxide, water, and sunlight and release oxygen into the atmosphere. Due to this, it is believed oxygen in the atmosphere was the result of cyanobacteria and other primitive organisms that carried out photosynthesis.

You might be interested in
Sketch a section of a phospholipid bilayer of a membrane, and label the hydrophilic head and hydrophobic tail of one of the phos
meriva

Answer:

The hydrophobic tails are sandwiched in between because they are ‘water-hating’ leaving the hydrophilic ends (which are ‘water-loving’) to interact with the watery environment inside and outside of the cell. The hydrophobic ends are mainly made of fatty acid chains ( and have no charges) while the hydrophilic ends are made of phosphate molecules that are negatively charged.

5 0
4 years ago
Question 2
noname [10]

Answer:

The correct option is ALL OF THE CHOICES ARE CORRECT.

Explanation:

Germicidal chemicals are chemical substances that are normally used to eliminate germs. There are many factors that one needs to consider when it comes to choosing and buying the right germicide. For instance, one has to consider the suitability of the germicide with the material that is been treated, one has to consider the impacts of the chemical on the environment, one also has to consider the cost, toxicity, safety and other factors. Thus, all the factors given in the options have to be considered when one is trying to decide on the right germicide.

6 0
4 years ago
A series of deep muscular relaxation techniques combined with visualization is characteristic of:
natali 33 [55]
<span>Progressing Muscular Relaxation or PMR. This is a technique to make a patient learn to calm themselves in any stressful situations. This method combines with passive concentration, visualization and deep breathing techniques. It is working with muscle tension and relaxation exercises.</span>
4 0
3 years ago
Gametes are produced by the process of
kirill [66]
The answer is D meiosis
3 0
3 years ago
Can someone fill this in for me (it doesn’t have to be accurate)
anygoal [31]

Can you add it again

the image is looking too blurry in my computer

8 0
3 years ago
Other questions:
  • What are three different modes of transportation for protists?<br>1.<br>2.<br>3.
    15·1 answer
  • What are the funtions of the digestive system
    7·1 answer
  • Carbohydrates start digestion in the
    5·2 answers
  • What occurs as part of gas exchange
    13·1 answer
  • Structure of penicillin G​
    5·1 answer
  • Describe how genetic information is passed from parent to offspring
    10·1 answer
  • Prior to the industrial revolution in England the peppered moth had light
    13·1 answer
  • How has the moss campion adapted to enable its survival in the alpine biome? a. Waxy needles b. Cone-shaped c. Thin trunks d. Lo
    12·1 answer
  • What is one reason coral reefs are such diverse ecosystems?
    8·1 answer
  • 4. What is the difference between a density dependent and a density independent limiting factor? Give an example
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!