Medusa
jellyfish
Medusa
Medusae
Polyp
polyp
Cnidarians have simple structure; a blind ended gut, tentacles, a pharynx and several other minor organs, and gonads.
a crazy guy named Steve
a crazy guy named Steve
a crazy guy named Steve
The form under the top of the mushroom.
Sporulation is a form of asexual reproduction in mushrooms. Actually, mushroom spores are asexual bodies which can lie in dormant stage for a long period of time and germinate when exposed to favorable conditions. It is not possible to provide a picture of a mushroom spore as answers do not support pictures. Do a Google ImageSearch to get images of mushroom spores.
A hydra has two body shapes. The first one is known as polyp which has tentacles and the other body form is known as medusa.
No, mushroom is singular noun; mushrooms is the plural form.