The Green Revolution has improved agricultural production through a variety of ways. ALL BUT ONE is a way agricultural production has been improved.
A)
The dependency on groundwater for irrigation of crops.
B)
Genetically engineered crops select for desired traits.
C)
The dependency of farm machinery to do work rather than human laborers.
D)
The increased use of fertilizers and chemical pesticides and herbicides.

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'(basidium)the spore--bearing structure of a basidiomycete is called a basidiocarp; ///

so whats the answer