Answer:
Sister chromatids.
Explanation:
Sister chromatids are the two identical halves of a chromosome that are held together at centromere with help of cohesin. DNA replication in the S phase of the cell cycle doubles the amount of DNA. The copies of the DNA formed during DNA replication are accommodated in sister chromatids. Hence, two sister chromatids of a chromosome carry the identical DNA helices and associated proteins.
The thermosphere is a layer of the earth's atmosphere directly above the mesosphere and below the exosphere. It extends 56 miles to about 621 miles above the earth.
It is in the thermosphere that auroras are seen. An aurora is luminous atmospheric phenomenon appearing as streamers or bands of light sometimes visible in the night sky in northern or southern regions of the earth. It is thought to be caused by charged particles from the sun entering the earth's magnetic field and stimulating molecules in the atmosphere.
Tissues is the most basic organismal level, <span>which are groups of similar cells that act as a functional unit. </span>
The nucleus i would say it controls all your cells and hen membrane