The correct answer is (c) Produces short-term energy for the cells when oxygen is not available
The anaerobic fermentation is needed by the body when there is depletion in oxygen level. When the body is in normal conditions, sufficient amount of oxygen is present then aerobic respiration takes place. When there is a condition that the requirement of oxygen is not fulfilled then body shifts to anaerobic fermentation for a short period of time, then it returns back to the normal conditions.
The answer is water vapor.
Water is presented in the form of tiny gas particles called water vapor in the atmosphere. The clouds are formed when this invisible water vapor in the atmosphere condenses onto microscopic particles (dust, dirt,...).
The word 'science' is derived from the Latin word 'scientia' which means knowledge. Therefore, science is about gaining knowledge either through observing, studying, experience, or practice. Entire knowledge acquired through science is about discovering truths, finding facts, uncovering phenomenon hidden by the nature.
For this problem, I think you missed to include the observation or the result of the incubation that has to be shown. However, I think that this problem is talking about not just a single species growing in the plate. This is due to unsterilized materials used and/or in the contamination from the procedure of the streaking itself.
Normal polarity
Explanation:
Earth's magnetic field used to be twice as strong 1.5 billion years ago as it is today and Earth's temperature other than what the geologists see from the 'normal' pattern. It has been noticed that some volcanic rocks were magnetized in opposite direction to the direction of the local Earth's field. It is clear that the Earth has experienced the normal polarity 1.5 years ago but at that time, the Earth's polarity was poorly understood.