How can the author use connotation to give this excerpt a more frightening tone?
Daylia shot him an odd grin and began to open the mysterious
envelope
A. Change "mysterious" to "intriguing."
B. Change "an odd" to "a sinister"
C. Change "grin" to "smile."
D. Change "began" to "started

Type the correct answer in each box. use numerals instead of words. if necessary, use / for the fraction bar. the following chemical equation shows the combustion of ethane. balance the equation by filling in the coefficients. c2h6 + o2 → co2 + h2o

Abnormal softening of a gland is known as

Plz ! a scientist wants to produce a cow that makes a particular human protein in it’s milk the desired protein causes blood to clot and can be used to treat hemophilia (a blood clotting disorder). which of the following would be best for the scientist to use? a. genetic crosses. b. cloning. c. selective breeding. d. genetic engineering.