Answer:
The planarians in the diagram are in the process of regeneration. This is a type of asexual reproduction.
Explanation:
Planaria is known as the flat worm of free life that usually lives in fresh water. Generally we can find it under rocks and debris, also in ponds, springs and streams. They are characterized by having a soft, wide and leaf shaped body, a digestive tract in three branches and two eye spots that act as photoreceptors. The ability of this insect to regenerate parts of its body and its various reproductions systems, have made it one of the most interesting for scientific research.
These animals can reproduce asexually or sexually, the latter being the most common.
Many planarians are able to reproduce asexually by fragmentation, they are able to clone themselves by transverse or longitudinal division. Others can also be reproduced asexually by budding.
When asexual reproduction occurs, this earthworm anchors the end of its tail separating it from the anterior portion. Each half regenerates lost parts again becoming new planarians.
