Why are sponges considered to be an evolutionary dead end

Sponges are often considered an evolutionary dead end because they are so specialized in pumping water through their bodies that it is considered impossible to be modified into anything else. Although sessile, sponges can change their shape and grow towards water rich food.

Explanation: please give brainliest!

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.