9 янв. 2020 г. · Echinoderms shows external fertilization, the eggs and sperm cells are released into open water, where fertilization takes place. Hence, option B is correct.

9 янв. 2020 г. · Reproduction is asexual only; Fertilization is usually internal; Sexes are united; Development is indirect with free-swimming larve.

In this article we review some of the seminal and recent findings that feature similarities and differences in sea urchin and starfish at fertilization.

Echinoderms typically undergo external fertilization, where the female and male individuals release their eggs and sperm, respectively, into the water where ...

External fertilization usually occurs in aquatic environments where both eggs and sperm are released into the water.

In Echinodermata, fertilization is usualy external.

Internal fertilisation has been observed in three species of sea star, three brittle stars and a deep-water sea cucumber. Even at abyssal depths, where no ... Sea urchin · Sand dollar · Fromia indica · Crinozoa

22 нояб. 2024 г. · External Fertilization. External fertilization usually occurs in aquatic environments where both eggs and sperm are released into the water.

Fertilization can occur inside as well outside of the female body. In mammals, it occurs inside the female body and in echinoderms, it occurs externally.