A group of students combined different substances together during several experiments. Their observations are recorded on the chart below. 1. A blue liquid and a yellow liquid were mixed and it turned green

2. A solid substance dissolved in a clear liquid

3. Two room temperature liquids were mixed and the temperature increased

4. Two different liquids were mixed and began to separate and layer in a beaker

In which experiment did a chemical reaction likely occur?

1
2
3
4?

When water freezes, it . contracts expands

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.

Blank is a rock with a find dark texture that makes up the oceanic crust