How can the knowledge of the human genome be useful for in-vitro fertilization techniques? a) genes with the desired traits can be introduced into the sperm of infertile males. b) the genes that cause infertility can be removed from the female ovum. c) proteins can be injected into infertile individuals to increase fertility. d) disease-free sperm and ova could be identified and used.

I believe the answer is A

the only answer that would make any sense to me is the first one.

1. loamy sand is about 80% sand with 10% clay and defined mostly by sand particles with some clay to provide structure and fertility. the sand particles are easily visible and the soil holds structure but breaks apart easily.

2. scott sand can improve his soil quality by incorporating more silt and organic matter into the soil. peat moss and organic matter can also be incorporated.