C. Agar provides a solid surface for bacterial growth.
Agar is a substance obtained from red algae which when added to a culture media, provides a solid surface for the growth of bacteria. When the agar is not added then the culture media remains as the broth and when the agar is added then the broth gets solidified.
Agar is added 1.5-2% in the broth to get solidified. The growth of the bacteria depends on the amount of agar added. Agar is used for the growth of bacteria because it has gel like properties which holds the nutrients evenly and the bacteria can use it accordingly.
Living organisms such as bacteria, fungi, algae are very important in the soil, they perform several functions, some of which include the following;
- Living organisms help break down dead plant parts, this helps to add more nutrients to the soil
- Living organisms dig up holes in the soil, this helps to maintain aeration in the soil.
- Living organisms play a major role on the production of humus
- Living organisms help to break large particles of rock
- Living organisms such as Rhizobium bacteria help in the fixing of nitrogen
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Answer:
The correct answer is option B. pulmonary stenosis.
Explanation:
Hypertrophy of the right ventricle is also called right ventricular hypertrophy is a condition in which the heart muscles of the right ventricles are enlarged or thickened.
The hypertrophy of the right ventricle is a response to pulmonary stenosis. Pulmonary stenosis is the condition in which blood flow from the right ventricle to the pulmonary artery is obstructed due to the stenosis or narrowing at one or several points.
Thus, the correct answer is option B. pulmonary stenosis.
Hypotonic (assuming that the solution on the outside is the same solution on the inside)
