Answer:
a. 1/2 b. The organism is an animal
Explanation:
a. What is the medullary index for an organism that has a medulla width of 2cm and hair shaft width 4cm?
Medullary index = diameter of medulla/diameter of hair.
Given that diameter of medulla = medulla width = 2cm and diameter of hair = hair shaft width = 4cm,
Medullary index = diameter of medulla/diameter of hair = 2 cm/4cm = 1/2
b. Is this organism human or animal?
Since the medullary index = 1/2 > 1/3 (if it is ≤ 1/3 it is human hair and ≥ 1/2 it is animal hair), it is animal hair. So, the organism is an animal.
The correct answer is the Cell Death.
The cell death may be the result of the natural process of old cells dying and or might be as the result of different factors like disease or localized injury. The cell death is necessary for the survival of an organism, for its development and growth. There are different types of cell death and different classifications of them. Most commonly it is classified by its s morphological appearance, so it may be apoptotic, necrotic, autophagic or associated with mitosis.
