Plasma membrane is similar to a cell membrane
Answer:
The correct answer to the question is: b) Amphipathic molecules.
Explanation:
- The membrane structures are composed of molecules having both hydrophobic and hydrophilic regions. These are called Amphipathic molecules.
- The hydrophobic region is formed of water insoluble lipid (fatty acid) molecules which tend to avoid contact with water and so remain in the interior of the membrane.
- The hydrophilic region is formed by water soluble phosphate groups which forms hydrogen bonds with the water molecules and so remain on the surface of the membrane.
- Therefore, a membrane is formed from by a phospholipid bilayer, that is, two layers of phospholipid polymer where the lipid part is directed towards the centre away from water and the phosphate part towards the surface in association with water molecules.
- A single phopholipid moiety is composed of a glycerol molecule which forms two ester bonds with a phosphate group and a fatty acid molecule.
Jessica could be blood type AO or AA
her husband has to be OO
if jessica is AO then the chance is 50%
if jessica is AA then the chance is 0%
Answer:
In a community, every species interact with each other. This results in the competition among them for food and habitat. The competition is more when the resources are limited and every species compete for it. Thus the efficient species will survive and the weaker one will perish. This is known as the competitive exclusion principle.
According to this principle, two species cannot live together in the same habitat and have the same niche. Niche is the resource used by individual species and it should not be shared by many species.
If the species want to coexist in a community without any competition the niche should be different. Otherwise, it leads to evolution.
Because if resources would overlap in use, the species which less dependent on the resource will be selected for evolution. If both the species is unable to evolve and rely on the same niche, then there is rigorous competition. The species which is powerful and fit exploit the resource and this leads the other species to extinction.
This competitive exclusion principle has shown in the two paramecium species - Paramacium aurelia and Paramecium caudatum. When they are grown individually in the culture medium they thrive. But when they are grown together in the same culture medium, Paramecium aurelia extinct the Paramecium caudatum for food.
The difference is in <span>the presence of a carbon atom
</span>
