The discovery of cells was made possible by the invention of microscopes. Today several different types of microscopes are used by scientist. Which of the following best describes transmission electron microscopes

Transmission electron microscopes are used to capture images or thin samples at a much higher resolution in comparison to light microscopes.

coconut why: has water in it : )

organisms that lack symmetry are called asymmetrical and belong to phylum porifera/sponges.

organisms with specialized stinging cells belong to phylum cnidaria. stinging cells are called cnidoblast cells.

cnidarians show two morphological forms : polyp (sessile) and medusa (mobile)

filter feeding is observed in porifera members.  

alternation of generation is observed in coelenterata or cnidaria. there is alternation of asexual polyp form and sexual medusoid form. it is also referred as metagenesis.