This is true because certain manufacturing companies and other industries still donot comply with the governmental regulations and release the toxic wastes containing sulfates, into the water bodies. This contaminates them and the maximum allowed sulfate level of the water body exceeds its limit.
The process by which oxygenreleased into the atmosphere by photosynthetic organisms is taken up by aerobic organisms while the carbon dioxide released as a by-product of repiration is taken up for photosynthesis. Origin ofoxygen cycle Expand.
Atoms are the smallest building blocks of elements having the same chemical and physical properties of that specific element. Atoms combine together with the help of electrons, to form a little more complex entity like the molecules, crystals, liquids etc. Some molecules combine together to form a more complex entity like the DNA which is the most complex molecule. The whole universe is made out of these simple building blocks, including the human body.
Answer:
Biotic, Abiotic
Explanation:
Question 4) <u>biotic</u> means living things and those all marked are living animals or plants
Question 5) <u>abiotic</u> these refer to non living things
Answer:
4.54 billon years
Explanation:
the earliest time that life forms first appeared on Earth is at least 3.77 billion years ago possibly as early as 4.28 billion years
