Answer:
Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.It can be decomposed into simpler constituents using chemical reactions. Example: water 
Physical property is defined as the property of a substance which becomes evident during physical changes. Water is liquid at room temperature whereas hydrogen and oxygen are gases at room temperature.
Chemical property is defined as the property of a substance which becomes evident during chemical changes. Water reacts with metals to form bases, hydrogen reacts with metals to form hydrides and oxygen reacts with metals to form oxides.
Answer:
Answer is C
Explanation:
Each cell has an identical copy of DNA with enzymes controlling the expression of specific genes leading to a variety of cells
Answer:
I think A, "Primary pollutants from a stationary source"
Explanation:
Got it right on exam :)
The Triassic follows the most important extinction occasion within the records of lifestyles, and so is a time whilst the survivors of that event spread and recolonized.The organisms of the Triassic can be considered to belong to certainly one of three businesses: holdovers from the Permo-Triassic extinction, new businesses which flourished in brief, and new agencies which went on to dominate the Mesozoic international.
