Answer:
The pulmonary veins carry oxygenated blood to the heart. Air enters the bronchioles in the lungs and reaches the alveoli. The capillaries join together to reach the arteries, transferring the oxygen. The oxygen-rich blood moves from the aorta and reaches the kidneys through a series of blood vessels.
Answer:
The composition of the matter stays the same.
Explanation:
I am pretty sure that this is the answer because the matter itself is not changing, it is simply changing shape. it would only be a chemical change f the composition of the matter changed.
Both because their can be pollution and good things
Answer:
Option B, Most communities never become completely stable
Explanation:
In an ecological succession, most of the species are unstable and they keep on changing continuously. The succession is primarily of two types –
a) Primary Succession – In this, community of species occur on a new habitat which had been never occupied earlier. Or it can be said that it is entirely a new habitat.
b) Secondary Succession – In this, community of species occur in a habitat where earlier life existed but it was disturbed or damaged by some environmental condition.
Hence , the correct answer is option B
