Microtubules are hollow tubes of protein that maintain cell shape and permit movement of cell organelles.
Answer:
The correct match is compound fracture: the fractured bone ends penetrate the skin. Letter A
Explanation:
<em>A compound fracture, also known as open fracture, is a fracture in which there is an open wound or break in the skin near the site of the broken bone. Most often, this wound is caused by a fragment of bone breaking through the skin at the moment of the injury.</em>
Answer:
If all the bacteria are removed from the earth, all the organisms are negatively affected.
Explanation: There are also some beneficial bacteria which helps in the nitrogen fixation called Nitrogen fixing bacteria such as Cyanobacteria and Azotobactor. These bacteria fixes atmospheric nitrogen into ammonium and nitrates form because plants are unable to use the atmospheric nitrogen, it only use nitrogen in ammonia and nitrates form. Plants absorb nitrates and form amino acid.
