Lsotopes of uranium are used as nuclear fuel in power plants. true false

True

Explanation:

The following two isotopes of Uranium which are prominently used in a nuclear chain reaction.

a) Uranium-233

b) Uranium-235

Uranium 235 consists of 92 protons and 143 neutrons. When an excited electron hits a Uranium atom, it splits into two smaller atoms and release heat energy under the process of fission.

There is another isotope of Uranium i.e Uranium -238, but it does not break easily and hence is less preferred for a nuclear reaction.

Thus, it can be said that the statement "lsotopes of uranium are used as nuclear fuel in power plants." is true.

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.

answer:

sequence 1- deletion

                  2- duplication

                  3- insertion

                  4- substitute

                  5- inversion