Enzymes in saliva kill some bacteria and protect the mouth from infection. When food reaches the stomach, much of it is sterilized by the hydrochloric acid in digestive juices. Further into the digestive tract, the friendly bacteria living in the intestines provide protection from invading bacteria
Answer:
BACTERIA!!
Explanation:
i love learning about back when earth was young so i know this is right
Answer: any virus should be classified by or what it is
Explanation:
Answer: A. plants produce oxygen during photosynthesis and they also need oxygen from the air for cellular respiration.
In the process of photosynthesis the plants in the presence of sunlight, water and carbon dioxide produces a carbohydrates as food and oxygen is liberated into the atmosphere. The process of photosynthesis takes place in day and plants avail oxygen from the roots and leaves for respiration. The food produced is broken down into carbon dioxide and water with the release of energy in the presence of oxygen during cellular respiration. Plants produce oxygen as a byproduct of photosynthesis and use oxygen for cellular respiration.
On the basis of the above information, A. plants produce oxygen during photosynthesis and they also need oxygen from the air for cellular respiration is the correct statement that describes the relationship between plants and oxygen.
The right answer is: <span>A
<span>A biogeochemical cycle is the process of transport and cyclic transformation of a chemical element (like oxygen, carbon or azote) or a compound between the large reservoirs that are the geosphere, the atmosphere, the hydrosphere, in which the biosphere is found.
</span>The three elements are able to exist in a gaseous form in the atmosphere to complete their respective natural cycle.</span>
