Answer:
The student claim is incorrect
Explanation:
Uncontrollable cell division leads to formation of tumours and cancers if cells were to lose contact inhibition and migrate to other parts of the body.
Answer: The answer is Calcium.
Explanation:
Duchenne muscular dystrophy is an X-linked recessive inheritance disorder that is passed from the mother (the carrier) to the child, mostly the male. It is a disorder of progressive muscular weakness. Those who inherit it have a defective gene related to dystrophin which is a muscular protein. The gene that makes Dystrophin is broken and the muscles become weak. Calcium molecules also build up in the muscles.
This causes muscle weakness, frequent falls, trouble running or climbing the stairs and dependency on wheel chairs.
Answer:
The function of a root hair is to increase the surface area available for absorption in plant roots
Explanation:
Root hairs are located mostly near a plant's root tips. Most water absorption occurs through the root hairs due to its large surface area for absorption of water. The root hairs acts as a protective mechanism to prevent harmful bacterial organisms from infecting the plant via the xylem vessels.