What does the presence of only two tissue layers make cnidarians?

endodermic

diploblastic

ectodermic

none of the above

diploblastic

Explanation:

The Cnidaria phylum includes aquatic animals of which freshwater hydra, jellyfish or jellyfish, which are normally oceanic, and corals and sea anemones.

The body of the cnidarians is basically a sac formed by two layers of cells - the epidermis on the outside, and the gastrodermis in the interior - with a gelatinous mass between them, called mesogleia and open to the outside. For this reason, the cnidarians are said to be diploblastic.

oak trees? ? what was listed

spiders belong to a group of arachnids.

arachnids have the following traits :

they have two body parts.

they have eight legs unlike insects which have 6 legs.

they have no wings.

these traits distinguish them from insects.

the information that antonio is doubting us the statement that spiders differences are as a result of being first to evolve.

this is because the evolution of one species is independent of the other species.