Lignin
It is a complex organic polymer that form an important structural materials in the support system of vascular plants and can also be found in some algae. This is an important molecule in the structural composition of cell wall, such as in wood and bark. This also allow woods and barks to have strong, rigid which allows them to no break easily. Lignin can also be found inserted in the cell wall of this plants.
Name 4 gasses in the atmosphere besides oxygen and nitrogen<span>
Hydrogen
Argon.
Carbon dioxide.
</span><span>Helium</span>
Answer:
Explanation:
Given:
Represent
- Susan's velocity with 
- Michael's velocity with 
eastwards
westwards
Required
Determine how fast is relative to
From the question, one train moves eastwards while the other moves westwards.
This means that travel in opposite travel and the relative speed (V) is calculated as:
Substitute values for and
<em>Hence, the Susan's train is moving 2m/s in relative to Michael's train</em>
Antihistamines, <span>a drug or other compound that inhibits the physiological effects of histamine, used especially in the treatment of allergies.
Hope this helps :))</span>
