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Ivahew [28]
4 years ago
14

What led to the conclusion that single-celled prokaryotic organisms evolved in the absence of oxygen

Biology
1 answer:
Tema [17]4 years ago
4 0
Earth's atmosphere 3.5 billion years ago contained little or no oxygen.
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Marla investigates the properties of an unknown, clear liquid that she thinks is water. She lowers the temperature of the liquid
irina1246 [14]
C salt lowers the freezing point of water. I am not 100% sure how this works but I know you can put ice an water to cool sodas fast, or even make ice cream. And besides, the other answers don’t make sense.
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4 years ago
The puppy on the left is pulling with 7 N of force, while the puppy on the right is pulling with 5 N of force. Which statement b
Diano4ka-milaya [45]

Answer:

D The forces are unbalanced by 2

Explanation:

basically, you subtract both your numbers if your number is 0 they are balanced if not then they are unbalanced by the difference of the two numbers

8 0
3 years ago
Wich statement best defines the relationship between work and energy
Blababa [14]

Answer:

Work can be defined as transfer of energy. In physics we say that work is done on an object when you transfer energy to that object. If one object transfers (gives) energy to a second object, then the first object does work on the second object.

Explanation:

4 0
4 years ago
The downfall of a tragic character is the result of __________.
ki77a [65]

The downfall of a tragic character is the result of <u>"a tragic flaw".</u>


The term hero is gotten from a Greek word that implies a man who faces affliction, or shows strength, despite risk. Nonetheless, at times he faces ruin too. At the point when a hero goes up against destruction, he is perceived as a tragic hero. Aristotle, the Greek philosopher, portrays these plays or stories, in which the principle character is a shocking saint, as disasters. Here, the hero goes up against his ruin whether because of destiny, or by his own oversight, or some other social reason.  

Hamartia refers to a tragic flaw that causes the downfall of a hero.

5 0
3 years ago
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In addition to natural factors, human activity can also alter ecosystems. Conduct research on a human activity that
victus00 [196]

The human activities in addition to natural factors that can alter the terrestrial ecosystem is deforestation.

<h3>The effects of deforestation on food web</h3>

Deforestation is a the clearing of trees in a large area of land which can be purposeful or by nature.

Human activities that leads to clearing of trees include the following:

  • agricultural expansion,

  • cattle breeding,

  • timber extraction,

  • mining,

  • oil extraction,

  • dam construction and infrastructure development.

One of the negative effects of deforestation on food web is the reduction in food availablity. This is so because of the loss of biodiversity that are source of food to man.

The human activities in addition to natural factors that can alter the terrestrial ecosystem is deforestation.

Learn more about deforestation here:

brainly.com/question/12394613

5 0
2 years ago
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