An object that starts and ends at the same point would have zero displacements.
<h3>What is displacement?</h3>
Displacement is the property of a body or an object to be moved from one place to another.
Thus a body that moves or is moved from point A to point B has been displaced.
A body with zero displacements either did not move at all or finished at the same point it started.
For example, a body that moves from point A to B, and then back to A will have zero displacements.
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Answer:
e. secretion, absorption and chemical protection
Explanation:
Epithelial tissues is responsible for the protection of the skin, absorption of nutrients during digestion and secretion of waste materials. These tissues form covering to all body surfaces. They also perform a variety of other functions such as excretion of waste substances, filtration of air from dirt and particles and clean the air that is inhaled, diffusion, and sensory reception.
Answer:
The correct order is 3, 4, 2 and 1.
Explanation:
Atherosclerosis refers to the condition in which the plaque gets accumulate within the blood vessels' walls. In the condition, inflammation occurs in the arteries' inner lining. The following is the sequence of events that results in atherosclerosis is:
1. A huge concentration of LDL cholesterol gets gathered within the inner walls of the arteries.
2. This causes discharging of macrophages to the site.
3. The engorgement of WBCs takes place with fatty deposits.
4. The hardening of plaques takes place, which eventually prevents the flow of blood in the prime arteries.
