Answer:
D. It formed from magma that cooled quickly
Explanation:
From several experiments, geologists have come to terms with the fact that when magma cools rapidly, it does not give room for large and big sized crystals to form. Instead, tiny, little crystals would be formed.
For example, obsidian and most volcanic rocks.
When a magma has enough time to cool and solidify, we see very big crystals of minerals in them.
The number of species on Earth tagged at 8.7 million as of 2011.
<span>AntiÂpsychotic drugs generally work by blocking a specific subtype of the dopamine receptor, known as the D2 receptor. This helps to regulate the functioning of brain circuits that control thinking, mood, and perception.</span>
Answer: James Watson and Francis Crick
Explanation:
In 1953 James Watson and Francis Crick are responsible for determining the structure of DNA. James and Watson proposed that the DNA is made up of a double polynucleotide chains that are twisted around each other to forming a helical structure. The two DNA chains runs anti-parallel in opposite direction to each other. Like the structure of the ladder.
The answer is James Watson and Francis Crick
