A student wants to determine whether a certain variable affects the rate at which crickets chirp. She counts the number of times different groups of crickets chirp per
minute. She records her data in the table below.

Number of crickets
Amount of food
Size of enclosure
Temperature

Which two groups of crickets can the students use as part of a good experimental
design?

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

Why do oceanic plates tend to subduction when colliding with a continental plate

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.