Which of the following statements best describes mining’s impact on the environment? a) mining only affects the living parts of the environment. b) because minerals are within the earth’s surface, extraction by mining causes destruction. c) mining requires the absolute destruction of an area to be cost-effective. d) areas that are mined can never again sustain plant life. e) the cost of mining is extremely low compared to the money earned from mining, creating income to improve the environment.

Legumes, a type of plant, require rhizobia, a type of soil bacteria, to survive since these organisms fix nitrogen during photosynthesis. rhizobia use the legumes for food. what would most likely happen to the legume population if rhizobia suddenly became extinct?

Imagine you are introducing the lac operan and the trp operon to students who have never learned about it before. complete the table to compare the similarities and differences between the two operons

Duchenne muscular dystrophy is a serious condition caused by a recessive allele of a gene on the human x chromosome. the patients have muscles that weaken over time because they have absent or decreased dystrophin, a muscle protein. they rarely live past their twenties. how likely is it for a woman to have this condition? a) women can never have this condition. b) one-fourth of the daughters of an affected man would have this condition. c) one-half of the daughters of an affected father and a carrier mother could have this condition. d) only if a woman is xxx could she have this condition.