<h2>Gelatin </h2>
Explanation:
Gelatin is a differential medium which tests the ability of an organism to produce an exoenzyme, called gelatinase (this enzyme hydrolyzes gelatin)
When gelatin is at a temperature below 32°C (or within a few degrees thereof), it is a semisolid material and at temperatures above 32°C, it is a viscous liquid
When gelatin is broken down, it can no longer solidify and if an organism can break down gelatin, the areas where the organism has grown will remain liquid even if the gelatin is refrigerated
No the conclusion by student is not right because the tube must be runny after incubation followed by refrigeration to be considered gelatinase positive
Bacteria that change nitrogen gas from the atmosphere into solid nitrogen usable by plants are called nitrogen-fixing bacteria. These bacteria are found both in the soil and in symbiotic relationships with plants.
Answer:
c. warms slowly, but holds heat longer
Answer:
We reduce the size of the cell
and increase surface area to volume ratio.
Explanation:
Answer:
ver explicacion
Explanation:
Las células vegetales pueden realizar la fotosíntesis porque poseen cloroplastos que contienen clorofila.
La clorofila es el pigmento verde de las células vegetales que absorbe la luz durante la fotosíntesis.
Las células animales carecen de cloroplastos, por lo que no realizan la fotosíntesis.
Las plantas producen su propio alimento a través de la fotosíntesis y se dice que son autótrofos, mientras que los animales dependen de las plantas para alimentarse, por lo que los animales son heterótrofos.
