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Mars2501 [29]
3 years ago
10

In most hypotheses of early Earth and the formation of life, it is accepted that the atmosphere was a reducing one. This means t

hat there was an abundance of methane, ammonia, and water vapor, but there was an absence of significant amounts of oxygen gas. Based on this assumption, what was likely the first metabolic activity to harness ATP to evolve in primitive cells?
A) Photosynthesis, as plants evolved before animals
B) Cellular respiration, as this generates the most ATP
C) Glycolysis, as this does not require organelles not oxygen
D) Calvin cycle, as glucose was required by all cells for metabolism
Biology
1 answer:
Alona [7]3 years ago
8 0

Answer:

C

Explanation:

It is believed that glycolysis – the first phase of cellular respiration in eukaryotic cells- is considered an ancient biochemical process that early organisms utilized to tap the energy required for cell functions. This is because the process does not require oxygen – because early conditions on earth were anoxic before the great oxygenation event.  It is after the great oxygenation event that the Krebs cycle evolved.

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8 0
3 years ago
Which process is responsible for the growth and repair of human tissue ?
muminat

In general, the process responsible for the growth and repair of human tissue is the healing process, which takes place in three phases.

1. inflammatory response. Injured tissues release  chemicals that draw resources to the area, alert the body that damage has occurred and inhibit function to prevent further injury.

2. Repair phase. Once injured area is walled off and debris removed, construction to  replace or repair injured tissue begins. New blood vessels grow in the injured area maximizing transport within tissue.

3. Remodeling phase. Construction of permanent tissue , typically strong scar tissue made from dense network of collagen fibers. 

Looking at it from cell level, the process of mitosis is actually taking place during  healing. 

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New cells are needed throughout life. These are for growth and replacement of damaged or worn out tissue. The body obtains such through the process of mitosis.

 

7 0
3 years ago
Read 2 more answers
What percentage of the food you eat is human atoms?
Llana [10]
........................76...............
5 0
3 years ago
Complete the sentences to describe natural selection
Vikentia [17]
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Reason:

Because, Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations.

2. Population has some genetic variations.

Reason:

Genetic variation is essential for natural selection because natural selection can only increase or decrease frequency of alleles that already exist in the population. Genetic variation is caused by:

mutation and random mating between organisms

3. Nature select organism with specific traits to survive and reproduce.

Reason:

According to Charles Darwin's theory of evolution by natural selection, organisms that possess heritable traits that enable them to better adapt to their environment compared with other members of their species will be more likely to survive, reproduce, and pass more of their genes on to the next generation.

6 0
3 years ago
Select all the most common elements which bond to carbon. 1. Hydrogen 2. Nitrogen 3. Sulfur 4. Sodium 5. Potassium 6. Magnesium
Fantom [35]
Hydrogen as in hydrocarbons
nitrogen as in cyanides
sulphur as in carbon di sulphides
oxygen as in combustion of carbon

the rest i left out needs a third party element to bond to carbon
8 0
3 years ago
Read 2 more answers
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