Hyphae are:  
             a.  the filamentous growth structures of many fungi.
             b.  divided by septa in the Ascomycota and Basidiomycota.
   c.  divided by septa in the Oomycota.
            d.  surrounded by a cell wall.
            e.  absent in the slime molds.​

Why do leaves change color in the fall? green pigments break down and no longer mask the color of chlorophyll. chlorophyll breaks down and no longer masks the colors of other pigments. red- and yellow-colored pigments grow and mask green-colored chlorophyll. green-colored chlorophyll breaks down and turns red and yellow.

What is a sex-linked genetic disorder that disrupts the blood's ability to clot? a. achondroplasia b. huntington's disease c. hemophilia d. albinism

What drives an advertising campaign?