Answer:
<em>The correct option is A) an increase in oxygen levels, which led to the extinction of many anaerobic organisms.</em>
Explanation:
Photosynthesis can be described as a process in which food (glucose) is produced by photosynthetic organisms by using carbon dioxide, water along with light energy from the sun. Oxygen is released as a by-product of this reaction. The process of photosynthesis initially allowed for oxygen gas to get accumulated in the air. This caused the rise of aerobic organisms who required oxygen for respiration. Before the photosynthesis organisms evolved, there was not enough oxygen gas on earth to support the life of aerobic organisms.
B. the bond forms when electrons are shared
Answer:
The correct option is A.
They have cheaper disposal fees.
Aquatic biomes are divided into zones based on the amount if Sunlight they receive
<u>Answer</u>:
Smaller planets would dissipate heat more rapidly and this criteria doesn't satisfy the conditions of existence of life.
<u>Explanation</u>:
The existence of life on Earth was possible because it fulfilled the criteria needed for the conditions of generating life in a planet. Its distance from sun is appropriate, it is made up of rock, it is big enough to have a core which is molten and it has a magnetic field. If it was a smaller planet, then it would have a liquid hot core that dissipate heat at a rapid rate. This condition doesn't support the criteria of life's existence.
