Answer:
Explanation:
El Parque Nacional de Yellowstone (Estados Unidos), considerado el parque nacional más antiguo del mundo, fue creado en 1872 durante la presidencia de Ulysses S. Grant. En sus inicios, la fauna del parque no recibió la misma protección que hoy en día: los lobos y los pumas fueron eliminados deliberadamente en 1926 y, al cabo de unos años, la población de ciervos aumentó tanto que los administradores del parque reconocieron que los herbívoros estaban alterando la vegetación, por lo que se realizaron matanzas selectivas para controlar la población de dichos animales. Las matanzas selectivas terminaron a finales de los años 60 y la población de ciervos volvió a aumentar, por lo que finalmente se optó por reintroducir el lobo: 14 lobos de la provincia de Alberta (Canadá) fueron liberados en 1995 y otros 17 lobos canadienses en 1996. "La reintroducción del lobo (Canis lupus) en el Parque Nacional de Yellowstone es el experimento ecológico más celebrado de la historia", así comienza un estudio publicado en Journal of Mammalogy por Mark Boyce, de la Universidad de Alberta.
Answer:
New vegetation and animals came to this place when the environment is suitable.
Explanation:
The ash and rock strewn surface began to undergo primary succession after few month when the soil is cool down because the soil has nutritive medium that helps the vegetation to grow on that land. In the primary succession, the new vegetation grows which is well suited to that environmental condition and uses the nutrients present in that soil for its growth and development. Many new organisms also came to this new landscape when the environment is suitable.
oxygen to the soil is the way it grows
Explanation:
but its other ways
<em>Four main classes that define a macromolecules are</em><em> </em>
- <em>Protein</em>
- <em>carbohydrates </em>
- <em>lipids</em>
- <em>nucleic acid</em>
<u>EXPLANATION: </u>
Macro-molecule is a large molecule which can contain more than 100's and 1000's of atoms. They are different from the smaller molecules and each macro-molecule does more than one function.
Macro-molecules are made up of single elements of monomers joined using covalent bonds and a large polymer is formed. For example, one molecule of polyethylene which is plastic has more than 2500 methylene groups, each one of them has two hydrogen and one carbon atoms.
The correct answer is: d. membrane thickness
Cholesterol is the second major lipid in the structure of the cell membrane (phospholipids are the major lipid components).
Cholesterol is rigid, so it gives the cell membrane extra support (strength and hardness) by immobilizing some of the lipid molecules around them. This rigidity makes it harder for small molecules to pass through the membrane, so it also has the influence on cell membrane’s permeability (the membrane becomes effective barrier to ions).
Cell membrane’s fluidity is also under the influence of the cholesterol which helps generate some extra space between the lipids allowing them to move freely throughout the membrane.
