Because lobsters and crabs are higher in the food chain then pesticides
The first and the fourth test tube exhibit a redish/brown color and the second and third test tubes show a dark blue/black color.
This variation exists due to the fact that amylase was added to the first and fourth test tubes. Amylase acts upon starch and breaks it down to simpler molecules. Therefore, when the IKI solution is added to check for the presence of starch, a negative result is shown. Meanwhile, the starch in the second and third test tubes remained and the IKI test showed a positive result for the presence of starch.
Answer: B. The bacteria must adjust to the nutrient content in the new medium, synthesizing necessary amino acids, growth factors, and enzymes.
Explanation: The lag phase is a time for adjustement to new environments, in this case new mediums. In that phase, bacteria sense the available nutrients to synthesize those required and grow as preparing for division, metabolizing to produce energy, making proteins, fatty acids, etc.
Respuesta:
d. Ninguno tiene la razón
Explicación:
Para convertir masa a moles, necesitamos la masa molar de cada sustancia.
Fernando (58.85 g Fe)
La masa molar de Fe es 55.85 g/mol.
58.85 g × 1 mol/55.85 g = 1.054 mol
Jacqueline (23.05 g Na)
La masa molar de Na es 22.99 g/mol.
23.05 g × 1 mol/22.99 g = 1.003 mol
Carlos (35.45 g Cl)
La masa molar de Cl es 35.45 g/mol.
35.45 g × 1 mol/35.45 g = 1.000 mol
Paola (27.0 g Al)
La masa molar de Al es 26.98 g/mol.
27.0 g × 1 mol/26.98 g = 1.00 mol
A) A scientific theory can never be prove