Question : The amount of oxygen in the atmosphere remains relatively constant because it is given off by
Option 1: oceans
Option 2: animals
Option 3: rocks
Option 4: plants
Correct Answer: plants
Solution : The correct option is plants.
Oxygen is cycled through the environment in a similar way to how water moves from the sky to the earth and back in the water cycle. Beginning with plants, the oxygen cycle begins. Through a process known as photosynthesis, they transform carbon dioxide and water into carbohydrates and oxygen. To put it another way, plants "breathe" in carbon dioxide and "breathe out" oxygen.
Application | Eligibility | Selection Process | Result | Cutoff | Admit Card | Preparation Tips
Question : The breaking up and decay of exposed rocks by temperature changes, frost action, plants, animals and human activity is called:
Option 1: Smelting
Option 2: Erosion
Option 3: Weathering
Option 4: Deforestation
Question : Rocks that are formed by the cooling of magma are called:
Option 1: Sedimentary rocks
Option 2: Igneous rocks
Option 3: Metamorphic rocks
Option 4: Rock salts
Question : Which of the following is true for photoperiodism?
Option 1: It occurs only in plants.
Option 2: It is related to flowering in plants.
Option 3: It is related to the feathers of animals.
Option 4: It is the reaction of organisms to the length of day or night.
Question : The colour of the plants is green due to the presence of:
Option 1: Urea
Option 2: Carbon dioxide
Option 3: Chlorophyll
Option 4: Oxygen
Question : Ozone consists of which of the following?
Option 1: Oxygen only
Option 2: Oxygen and Nitrogen
Option 3: Hydrogen and Carbon
Option 4: Oxygen and Carbon
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile