I am pretty sure it is the exogenous
Answer:
1.Temperature
2.Moisture
3. PH: acidic or basic concentration
Explanation:
Different microorganism grow at different temperature. For example, many human-disease-causing microbes have an optimum temperature of 37C, and most of the bacteria do not grow at temperature higher than 45C. This means that any temperature lower than 45C will favor the growth of certain bacteria while higher temperature may cause death or reduction in the population of most. Hence, the effect of temperature on these organisms.
Water is required to dissolve the cell substances in microorganism just like higher animals. while some can survive under an extremely dry condition, most can't and this could result in death or reduction in population.
PH, a measure of the hydrogen concentration in a solution for most microorganism is between 6-8, too much of acid or base could disrupt the activities of these organisms and a maintained range ensure an optimal survival.
The answer is B because air is made up of a lot of mixture
<span>Meteoroids are small objects in space, usually made of rock or metal. These bodies often get close to a planet and fall through its atmosphere. A burning streak of light, called a (B. COMET) is visible as it falls through the sky. Sometimes the object does not burn up completely and a part of it survives the fall to the planet’s surface. These rocky bodies, called (D. METEORITES)
are studied by scientists to gain a better understanding of our solar system. </span>