Which is true about the law of conservation of mass? a) when a new substance is formed, matter is added. b) atoms are destroyed during a chemical reaction. c) during a chemical reaction, atoms are created. d) atoms cannot be created or destroyed, only rearranged.

Could someone me with number one you

Which of the following is not a symptom of desertification? a) decrease in salt content of the soil b) lowering of the water table c) reduced surface water d) increased soil erosion e) loss of native vegetation

Many farmers prefer cattle without horns because it is safer for their herds. the allele for no horns (n) is dominant to the allele for the presence of horns (n). a farmer mates a male with horns to a heterozygous female without horns. what is the chance that the offspring will have horns?