The derived characteristic of protostome development is found in which of the following phyla?

a. sponges
b. echinoderms
c. cnidarians
d. roundworms

Which of the following happened during the precambrian era? the first prokaryotic cells the first eukaryotic cells development of photosynthesis all of the above

Everything in the universe originated from a single point. how was it possible for everything in the universe to have occupied a single point in space?

Qué sucede cuando una persona tiene muy poco o demasiado costeroides?