Because at the time of the first living thing we know that there was no free oxygen in the environment.
No. Oxygen is not noxious because it does not harm us or any living thing in any way.
Yes, it is a good thing to have more oxygen than nitrogen in the air because oxygen is essential for breathing and supporting life. Nitrogen makes up the majority of our atmosphere, but having a higher concentration of oxygen ensures that it can adequately fulfill its role in sustaining living organisms.
No, a candle flame is not a living thing. Living things have the ability to grow, reproduce, respond to stimuli, and maintain homeostasis, qualities that a candle flame does not possess. A candle flame is a result of a chemical reaction between the wax and oxygen, producing light and heat.
No, nitrogen and oxygen are two different elements. Nitrogen is a diatomic gas with the chemical symbol N2, while oxygen is also a diatomic gas with the chemical symbol O2. They have different properties and functions in the atmosphere and living organisms.
No, oxygen is an element. Chemical energy is usually the thing that hooks elements into compounds.
Anaerobic bacteria are living things that do not require oxygen to survive. These organisms can produce energy through other metabolic processes that do not involve oxygen, such as fermentation or using alternative electron acceptors.
Every living thing needs oxygen.
Water is not a living thing - it does not require food. Water is a molecule made up of 2 hydrogens and one oxygen. It does not take in food.
In general, living organisms are composed of about 65-70% oxygen. This varies by species and organism, with some containing more or less oxygen depending on their biological functions and metabolic processes. Oxygen is crucial for sustaining life as it is used in cellular respiration to produce energy.
you find out if its living if its respiratory system has to do with oxygen
A living thing is something that needs water and oxygen a non living thing does not need those things it can live without it.:)
A living thing is defined by the functions of life:responsivenessadaptabilitygrowthreproductionmovementmetabolismabsorptionrespirationexcretion
A living thing is something that needs water and oxygen a non living thing does not need those things it can live without it.:)
Oxygen is something no living thing could live without!
Water is not a living thing. It's a the chemical compound H2O, which stands for Hydrogen two oxygen.
because trees have oxygen and we use oxygen
living thing respire by taking oxygen in and carbon dioxide out of the cell