Answer:
Una variable de control (o constante científica) en la experimentación científica es un elemento experimental que es constante y sin cambios durante el curso de la investigación. ... Las variables de control en sí mismas no son de interés primario para el experimentador.
Explanation:
Because their use is not sustainable because their formation takes billions of years to renew them
The cell cycle is controlled by many cell cycle control factors, namely cyclins, cyclin-dependent kinases (Cdks) and cyclin-dependent kinase inhibitors (CKIs). Cyclins and Cdks, which are positive regulators of the cell cycle, activate cell cycle factors that are essential for the start of the next cell cycle phase.
Factors Affecting Cell Division
Nutrients. The nutrients present in the cell affect cell division. ...
Genetics. Genetic code regulates cell division. ...
Chemicals. Exposure to toxic chemicals such as pesticides and some cleaning chemicals can cause cell mutation. ...
Stress. Stress affects cell division.
Answer:
Villi are finger-like projections.They increase the surface area of inner walls and helps alot in absorption of digested food.
Explanation:
If the same protein keeps being produced it could be said that nothing is happening even though something happened, and if nothing is changing you could say that it is a silent mutation, which means that the answer is C.) Silent. The change in the amino acids and the nucleotides happened but it is silent and does not affect the outcome of the protein synthesis.