Digestion, medulla, heart, and involuntary muscles
At the end of the winter they are most numerous in fresh water. they will cover surface of aquatic plants or poles and wooden borders of ponds. If you like to study them you can scrape the brown growth with a flat piece of plastic. you can also use a sponge. for the free living (plankton) species fine mesh plankton net is very useful.
In hemophilia A it’s caused by a mutation in the gene for factor VIII. Hemophilia B is a result in a deficiency in factor IX due to a mutation in its corresponding gene.
In both cases, it is a mutation in the DNA (the macromolecule).
A genus is composed of a number of similar SPECIES.
Answer::-
B. Water and nutrients absorbed by roots to the stem and leaves.
Xylem constitutes of the complex tissues and plays the role of conducting tissue for water and minerals from root to the stem and leaves (shoot).
