Answer:
a = 9
Explanation:
5(a + 4) - 6a + 1 = 12
5a + 20 - 6a + 1 = 12
5a - 6a + 20 + 1 = 12
-1a + 21 = 12
-21 -21
--------------------------------
-1a = -9
/-1 /-1
---------------------------------
a = 9
The right option is; a. It is rich in minerals from volcanic deposits.
Volcanic soil (andisol) is a light and fluffy soil that is formed from volcanic ash and cinder deposits. Volcanic soil is very fertile because it is highly composed of non-crystalline minerals, such as allophane and imogolite from volcanic deposits. These minerals create strong bonds with organic matter which leads to the accumulation of organic matter in the soil. Volcanic soil has high water retention capability and it supports the growth of crops such as rice, maize and fruits.
Xray diffraction images produced by Franklin showed that DNA is a double helix.
Biological reactions can be classified as being of two main types: anabolic and catabolic. Catabolic reactions involve the break down of a larger molecule to release energy and smaller molecules; meanwhile, anabolic reactions are the opposite such that they involve the combination of molecules while consuming energy to form larger molecules.
Muscle growth is anabolic because polypeptides are formed using amino acids and energy.
