How do chromosomes vary in appearance?

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

Eutrophication caused by human nutrient pollution.

What part of the cell does 9 represent? a. cytoplasm b. lysosome c. ribosome d. centrosome