All of the following can pass through a healthy placenta EXCEPT which one?
A) water
B) nutrients
C) oxygen
D) some antibodies
E) blood cells
E
You might also like to view...
Discuss factors that must be taken into account when setting standards for safe levels of exposure to potentially harmful chemicals in the environment. Explain why setting these standards is such a complex task
What will be an ideal response?
The two amino acids in the accompanying figure both have side groups (R groups) that are ____
a. acidic and polar b. uncharged and nonpolar c. basic and polar d. acidic and nonpolar e. uncharged and polar
What types of membrane proteins catalyze reactions in the extracellular fluid or within the cell?
a. receptor proteins b. channel proteins c. recognition proteins d. enzymes
Which term refers to the external form of a plant?
a. anatomy b. morphology c. physiology d. ecology