.Phenylketonuria (PKU) is an inherited disease caused by a recessive allele. If a woman and her husband, who are both carriers, have three children, which one of these probabilities is wrong? One or more of the three children have the disease; 1-27/64= 37/64 All three children have the disease; 1/4 At least one child is phenotypically normal; 1- 1/64= 1/63 All three children are of normal phenotype; ¾ X ¾ X ¾= 27/64

Which would happen if more forests were cut down? a. the nitrogen cycle would be stopped b. nitrogen would be fixed by bacteria more quickly c. the amount of co2 in the atmosphere would increase d. fossil fuels would build up in the soil c the amount of co2 in the atmosphere would increase

2. how does the miller-urey experiment fall short of demonstrating that life can arise from inorganic molecules? explain. a. it doesn't show a leap between a collection of amino acids and a single-celled organism. b. it recreates the conditions that existed at the earth's beginning, but no molecules form as a result. c. it doesn't provide evidence of the formation of amino acids. d. it doesn't show how multicellular organisms developed from unicellular organisms

Which of the following types of rock would most likely contain a fossil? slate granite lava rock limestone