What planet is completely tilted to the side

In this experiment, the was intentionally manipulated. it is the independent variable. the dependent variables that were measured were the

Crossing over is a method of (blank)?

An organism's reproductive strategy includes all of the following except a. the number of offspring produced. b. the amount of energy expended in producing offspring. c. the length of time parental care is given d. the number of alleles an organism passes on.