<span>The question says,'...........convert ammonium into nitrates whilw .........converts nitrates into nitrogen gas. The correct option is A. Nitrification is a two stage process by which ammonia or ammonium is biologically oxidised to nitrate while dentrification is the biological oxidation of nitrate to nitrogen gas by dentrifying bacteria.</span>
Microglia - immune cells; smallest and least abundant
protect against foreign invaders
Answer:
The stomach helps to store food temporarily. It also secretes gastric juices that digest food.
Most of the digestive process (digestion and absorption of food) takes place in the small intestine.
The funtions of large intestine are temporary storage of undigested and unabsorbed food, reabsorption of water and minerals, elimination of waste products (faeces) through the anus, helps in antibody production and acid reduction, maintaining a large population of bacteria living inside the intestine which produce gas, vitamin K etc.
Explanation:
The food that entered the stomach mixes with the gastric juices (hydrochloric acid and pepsin ) and get broken down into smaller components.
The partly digested food is then passed into the small intestine where the food is mixed with digestive juices from the pancreas, liver, and intestine and broke it down into smaller molecules (nutrients) which are absorbed into the blood in the small intestine. The inner wall of small intestine has finger-like projections called villi, which contains a network of capillaries and lymphatic vessels. Nutrients are transported to these capillaries and lymphatic vessels from the villi by diffusion. This nutrient rich blood is then pumped through the circulatory system to the other organs.
The undigested and unabsorbed food passes into the large intestine where water and some minerals are reabsorbed back into the blood. The remaining waste products are eliminated through the anus (defecation). The large population of bacteria living inside the large intestine digest some material and creates gas, vitamin K etc. It has some role in antibody production and acid reduction also.
The answer to the question is d
Answer:
a discovery by a human being
Explanation:
The correct answer would be a discovery by human being.
Penicillin existed in nature and was only discovered, albeit accidentally, by Alexander Fleming.
It is different from<u> technological innovation because the latter requires the synthesis of products that are not in existence already or improvement on a product that has been created before</u>.
Discovery is also different from advancement in technology. <u>The latter refers to the process of inventing, innovating, and spreading technological processes in society.</u>
Discoveries are usually natural and are not in any way an invention. However, advancement in technology can aid discoveries.