The type of cells that secrete directly into the blood stream are cells. a. exocrine gland b. squamous epithelial c. columnar epithelial d. endocrine gland

Compare the depth of field when focusing with low power and high power. which power has the greater depth of field?

Which list is in order from simplest to most complex? a bacteria - virus - plant - protist b protist - bacteria - virus - plant c virus - bacteria - plant - protist d virus - bacteria - protist - plant

Stem cells found adult tissue such as in bone marrow brain muscle skin and liver are only capable of what