Apotential cause of male infertility is a blockage of the vas deferens. the blockage could be due to the build up of scar tissue along the vas deferens. what medical treatment would most likely be used to treat this type of infertility? a. hormone therapy to increase testosterone b. medication to stimulate sperm production c. implantation of semen into the testes d. surgery to remove the obstruction

Which mantle is under the crust the upper mantle or the lower mantle i think it's upper let me know if i'm right

Which of the following describes a boom period? a. as one population increases, another population decreases. b. as one population increases, the other population also increases. c. as one population decreases, another population increases. d. as one population decreases, another population also decreases

Which of these is true of the cytoplasm of an unfertilized egg? a. it is an unevenly distributed mixture of mrna, proteins, organelles, and other substances. b. it does not contain substances that are important in directing development. c. these substances are supplied by the sperm. d. it does not contain substances that are important in directing development. e. development is directed solely by the surrounding cells. f. it is a homogeneous mixture of mrna, proteins, organelles, and other substances. g. it does not contain substances that are important in directing development. h. these substances are produced by the dna of the fertilized zygote.