If a male dog has 20 chromosomes in his sperm cell, how many does he have in his body cell?

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

Asmall population of chimpanzees lives in a habitat thant undergoes no change for a long period of time. how will genetic drift affect this population

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation