Question

поясни, почему у крота зрение развито плохо , а у червей паразитов например у ленточных червей живущих в кишечнике оргаизма хозяина органа зрения отсутствуют

Answer 1

Взрослые особи ленточных червей  обитают только внутри организма хозяина,поэтому зрительные органы им не требуются. а крот все же может  выбираться в редких случаях из-под земли наружу,на свет.

Answer 2

Vision in Moles and Parasitic Worms

The development of vision varies among different animal species based on their evolutionary adaptations and ecological needs. While moles have poorly developed vision, parasitic worms, such as tapeworms living in the intestines of their host organisms, do not possess visual organs at all.

Moles and Poor Vision: Moles are burrowing mammals that spend most of their lives underground. Their underground lifestyle has shaped their physical characteristics, including their vision. Moles have small eyes that are adapted for low light conditions and are covered with a layer of skin, making them difficult to see. Their eyes are also positioned to face sideways, which allows them to detect light but not form detailed images. Moles primarily rely on their other senses, such as touch and smell, to navigate and locate prey underground.

Parasitic Worms and Absence of Vision: Parasitic worms, like tapeworms, have evolved to live inside the bodies of their host organisms, such as humans or animals. These worms have adapted to their parasitic lifestyle by losing unnecessary structures, including visual organs. Since they live in the dark environment of the host's intestines, there is no need for them to have eyes or any visual capabilities. Instead, they rely on other sensory mechanisms, such as chemoreception, to locate and attach themselves to their host's intestinal walls for survival and reproduction.

In summary, moles have poorly developed vision due to their underground lifestyle, while parasitic worms, like tapeworms, do not possess visual organs because they live in the dark environment of their host's intestines.

I hope this explanation helps! Let me know if you have any further questions.