You can see the location of the appendages on the segments more clearly on the ventral side of the crayfish.
Explanation:
The answer is Because they are able to adapt to different conditions.
The least specialized animals are those animals that can survive in a wide range of different environmental factors, unlike specialized animals which are very sensitive to changes. If environment changes suddenly and drastically, highly-specialized animals could not survive because those changes are beyond a range of different factors that affects them. The least specialized animals could adapt to different conditions. For example, one species (specialized) lives in a temperature of 20-25°C. The other species (the least specialized) lives in a range of temperature 5-50°C.
If temperature changes drastically from 22°C to 10°C, the specialized species could not survive and the least specialized would just adapt to those conditions.
There are two principle elements of centrioles that we will concentrate on. 1. Cell division. The primary capacity of the centriole is to help with cell division in creature cells. The centrioles help in the development of the axle strands that different the chromosomes amid cell division (mitosis).
Hope this helps!
