Answer:
The centromere is an undivided structure of DNA.
Explanation:
Chromosomes attached to the mitotic spindle via structures called the centromere. The centromere is an undivided structure of DNA. Once the spindle fibers attached, they're able to position the chromosomes for cell division
Cellular respiration is best associated with the Mitochondria
The earth's surface features are constantly changing in a process known as weathering and erosion. Weathering would happen when rocks would break physically like frost shattering while erosion happens when sediments and rocks are moved from one place to another by agents like water, gravity, wind and ice. These two occurrences are the cause of the constant change of the Earth's surface.<span />