Which of the following are synapomorphies of mammals?
a. hair
b. vertebral column
c. five digits
d. mammary glands
e. endothermy
f. placenta

A) Hair and D) Mammary glands

Explanation:

 Synapomorphies of mammals are hair and mammary gland as, mammals are the distinct from the other tetra-pods having hair,mammary gland and three bone ear.  The three unique trait of mammals included three bones ear malleus,stapes and incus, presence of the hair and mammary gland for the production of milk.

i'm guessing this is from edg enuity so the answers would be, from top to bottom,

theodor schwann

matthias schleiden

robert hooke

rudolph virchow

anton van leeuwenhoek

a scenario where a cell may be needed to perform a form of endocytosis is when transporting large molecules. a scenario where a cell may be needed to perform a form of exocytosis is when releasing the large molecule from the cell.