Larger
During the process of breathing, the diaphragm contract by moving
downward and upward and this process usually increase or decrease the space in
the chest cavity. However, intercostal muscles between the ribs also help to enlarge
the chest cavity or reduce the space in the chest cavity.
organelles
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Answer:
The correct answer is c) The first statement is true; the second is false.
Explanation:
To be able to perform its role, a hormone must bind a specific receptor in its target cell. The receptor can be located inside the cell (in cytosol) or in the surface of the cell (transmembrane receptor). By regulating the expression of the receptor, the target cell regulates the hormonal activity.
The number of hormone receptors in a cell is not constant, it can vary depending on sereral factors, such as the age of the organisms, the effect of several drugs, mutations or diseases.
This is false. The more similarities the the amino acid sequences have, the closer related are the species. Therefore the more differences in the sequence, the more further related the two species are.
Answer:
El tamaño de la población cambia porque cuanto más alto se mira en la cadena alimentaria, menor es el número de organismos que ocupan ese nivel. Esto se debe a que la energía que está disponible de un nivel al siguiente tiene que disminuir, ya que se utiliza para el proceso de la vida.
