Someone answer these 2 pls How does homologous recombination (crossing over) increase genetic variation?

Ascientist wants to determine the effect of a new type of gasoline. he fillsone car with normal gasoline and another identical car with the new gasoline.which is the control group? a. the new type of gasolineb. the car with the normal gasolinec. the car with the new gasolinethe amount of gasoline usedd. the amount of gasoline used

What sre the effects of hemolytic disease of a newborn

Fungi are classified into how many groups? a. 1 group b. 2 groups c. 3 groups d. 4 groups