Answer:
C. natural selection
B. Gram negative organisms
Explanation:
which of what? is there an attachment
Answer:
It acted as a safety net in case the structure collapse.
Explanation:
When building public infrastructures, a collapse in the structure could potentially resulted in large number of deaths. This is why architects added protective features to the crucial components of the structure.
The protective features were designed to minimize the damage when there is some sort of problems in the crucial components of the structure.
When creating bridge for example, protective features often added to the foundation to ensure that the bridge wouldn't collapse completely in case one of the foundations is destroyed,
The main molecules present in the plasma membrane are<em><u> phospholipids</u></em>, those molecules are made of a polar, hydrophil end(glycerol with a phosphate group attached) and two non-polar, hydrophobe ends(two fatty acids rests). The cell identity is determined by <u><em>proteins </em></u>present in the membrane, a very important type of protein that determines the identity of a specific cell is called marker. The membrane fluidity is reduced by a lipid with a ring structure, <u><em>cholesterol</em></u>, this molecule belongs to a class of biomolecules called steroids.
