Answer:
Observation 1 is a result of copper atoms losing two electrons.
Explanation:
In the start of the whole process which we can see in picture, what happens is that the copper of the solution is oxidized by the solution of silver nitrate. In this process it loses its two electrons to form Cu2+ which go into the solution of silver nitrate. In the solution ions gain those two electrons lost by copper atoms which replace the copper atoms and which we can see in the form of grey particles on the edge of the strip. Therefore, if we see observation 1 it says that copper strip becomes thinner which evidently is because of the reason that copper is losing electrons and copper level is falling down and silver level is enhancing.
The copper ions in turn react with nitrate ions to form copper nitrate. You can see the whole process in the picture attached.
Hope it helps!
Chromoplast(Plastid) is the answer you are very welcome
Answer:
Option D, Gastric Juices
Explanation:
The second line of defense is a non specific defense mechanism in which no specific individual is targeted but all invaders are killed in general way. Some common mode of second line of defense are - Phagocytic cells (white blood cells), inflammatory responses, macrophage system etc. The second line of defense comes into action when the invader has surpassed the first line of defense which include either physical barrier like skin, mucous membrane, hair, cilia etc. or chemical barriers like gastric juices, saliva, Hyaluronic acid etc.
Hence, gastric juice does not belong to second line of defense.
Thus, option D is correct.