Initially, glucose was found only the dialysis tubing. after 15 minutes, a sample was taken. that sample showed that glucose was found the dialysis tubing.

Initially, glucose was found only   INSIDE

the dialysis tubing. After 15 minutes, a sample was taken. That sample showed that glucose was found  OUTSIDE

the dialysis tubing.

Explanation:

I did it

hormones in blood stream

image: dtc.ucsf.edu

endocrine glands secrete hormones into the blood stream near them; the hormones then travel in our bloodstream until it reaches its destination, called a target cell, in distance parts of the body. in the target tissue, hormones lock onto the target’s plasma membrane, called the receptor site.

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.