Steve traveled the first 7 hours of his journey at 40 mph and the last 9 hours of his journey at 50 mph how long is the whole journey in miles

How many copies of each chromosomes should be present in each of the 4 final haploid versions of gamete?

Select the situation bellow that would produce a total displacement of zero. a. a trip to the moon and then to mars b. a horse galloping from one end of a field to another c. the criss-crossing path of a bug as it flies from flower to flower d.a round-trip ride to school and back

What did hunter gathers do to alter the environment?