Answer:
Breathing is the exchange of oxygen and carbon dioxide between an organism and it’s environment.
Explanation:
Basically, breathing is the inhalation and exhalation of gases between organisms and environment. Animals inhaled oxygen gas and exhaled carbondioxide gas while plants inhaled carbondioxide and exhaled oxygen gas. Animals use oxygen in the process of respiration for releasing energy while plants take carbondioxide for the production of glucose in the process of photosynthesis.
Answer:
The substance taken in is mineral salts.
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Chromatin contains proteins and DNA. The cellular division processes, mitosis and meiosis, condenses the chromatin to form chromosomes. They divide into two cells (mitosis), then two 4 cells (meiosis). The chromosomes contain the gene.
