The Rh factor identifies the presence of the rhesus protein in blood. The Rh factor can be represented by a + or – sign. It is important to know the Rh factor because just like how the antigens on the blood must be compatible, the rhesus protein in blood must also be compatible. If a person has Rh+ blood they can receive blood

Blood type A

Explanation:

Blood type A Rh+

Antigens (on the surface of the red blood cells):

A indicates there are A antigens.

Rh+ indicates there are Rh antigens.

Antibodies (in the blood plasma):

B antibodies.

If there are A and Rh antigens but no B antigens, the antibodies in the blood plasma are B antibodies.  

"a.) well–developed vascular system."

some fungi obtain their nutrients from a living host (plant or animal) and are called most biotrophic fungi have fairly narrow host ranges—they are specialized on a limited called rhizomorphs that allow the fungus to grow from one tree to another. ascospores are formed inside a sac-like structure called an ascus. so your answer is a