According to the big bang theory, all matter in the Universe started at the same point in space and time) and has been expanding ever since. The big bang theory replaced the static model--that the Universe always had existed, was neither expanding nor
contracting, and has no beginning and no end.
Which of the following observations supports the big bang theory and contradicts the static model?
OA. Galaxies move as though they have far more mass than can be seen.
ОВ.
Different kinds of radiation are produced and absorbed by different things.
OC. Most galaxies are moving away from each other.
OD.
Stars are continuously being created and burning out or exploding.

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.

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.