Deoxyribonucleic acid (DNA) is the hereditary material that lies within the nucleus of all cells in humans and other living organisms. Most of the DNA is placed within the nucleus and is called nuclear DNA.
A chromosome is made up of two chromatids which are joined by the centromere. The chromatids separate from each other during mitosis to form two new chromosomes. The DNA making up a chromosome is dispersed as chromatin.
Under a microscope, chromatids look like little dots and chromosomes are lines.
Answer:
Magma.
Explanation:
This magma can push through holes or cracks in the crust, causing a volcanic eruption. When magma flows or erupts onto Earth's surface, it is called lava. Like solid rock, magma is a mixture of minerals.
<u>Answer:</u>
The layer of the rock is older than the layer above it and younger than the layer below it.
<u>Explanation:</u>
According to the law of superposition, the layer which is above is always younger than the layer below it. This law is based on the very common fact that the older layer had to lay down first and then a new layer formed above it. This process is used to determine the relative age of the rocks.
Helium could hold 2 neutrons in its nucleus.
