Which of the following is the most cost effective source of energy?

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

"a.) well–developed vascular system."

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.

answer; (a) medicalized;