A and c because I had the same problem and I picked a and it was a and c
Answer:
The given statement is true.
Explanation:
The oxygen that is present in the atmosphere has two main sources:
Terrestrial Plants: As we know that the plants make use of sunlight, water, carbon dioxide and chlorophyll in a process termed as photosynthesis and make glucose and releasing oxygen into the atmosphere which is then used by animals for respiration. This is one of the major source of oxygen in the atmosphere.
Oxygen released from Oceans: In the oceans of the earth, water bodies ,seas tiny plants termed as Phytoplankton are present that are present near the surface of the water bodied that also release oxygen by photosynthesis and account for about 50% of the world's oxygen supply.
the amount of water vapor in the air; when water evaporates, the humidity of the air is increasing; as the temperature of the air increases, the air's ability to hold water vapor also increases; recall, warm air holds more water vapor than cool air. Absolute Humidity.
The correct answer is: Rinsing with alcohol during the washing step stripped the bacteria off the glass slide.
The sample may be lost during laboratory preparation. Usually the errors occur during the heating step (due to overheating or insufficient heating).
Answer:
Option (B) Ethylene gas is a chemical signal through which ripening fruits trigger the ripening process in other fruits.
Explanation:
The ethylene hormone triggers the ripening process of fruit. However, in order to slow down the ripening process the action of ethylene is to be blocked. All fruits are capable to produce ethylene up to a certain level after which they start ripening. There are some classes of fruits that respond to the external ethylene such as apple, mango, tomato etc.
Hence, option B is correct