1.carbon 2oxygen 3.nitrogen is an element found in all organic molecules. during respiration, animals excrete it as a gas known as . 1 nh4 2 o2 3. co2

1st=Carbon

2nd=CO2

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1. Carbon

2. CO2

Explanation:

1. All living things are made of inorganic molecules mainly carbon and hydrogen. These two elements form the backbone of hydrocarbons which are considered as the building block of living things

2.During respiration in living beings (animals and human beings), the oxidation of carbohydrates takes place  in which glucose is break down into carbon dioxide and water.  

its been noted for the past decade or so that there is some (approximately 5% to 7%) shrinkage in the brains of people who have schizophrenia, most notably in the gray matter, which is an important part structures in the brain’s amygdala, hippocampus and parahippocampus, which are all involved in memory storage and retrieval memory storage and retrieval.

explanation:

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