Which one of the following is a type of passive transport?
a. exocytosis
b. endocytosis
c. proton pumps
d. osmosis

The idea of spontaneous generation was disproved by in a experiment involving jars of meat

Below, the levels of organization in a multicellular organism are shown from least to most complex. which level of organization can be described as several different types of tissues working together to perform a common task?

When new rock is added to an oceanic ridge, the magnetized strips on either side of the ridge are evidence of sea-floor spreading. this is because the rocks on the two sides of the ridge o are equal in width and in polarity are polar opposites oare magnetized vary in width but are equal in polarity