When people used stone tools,
The in-between period of time when the first man appeared and when man developed a writing system. Or the period of time before man became literate.
Answer:
Yes, this is true
Explanation:
Deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) are made up of nucleic acids found in the nuclei of living cells. They are the vehicles of genetic inheritance. Nucleic acids are condensation polymers of nucleotides.
Answer and Explanation:
It would be a novelty for me to have a discipline or to get involved in some stage or activity related to audiovisual media. I was always very curious about this branch, but I lacked opportunity and guidance, however, I believe that I will have more chances in college and will be able to build a very edifying and innovative experience for my academic life that will contribute a lot to my professional life, since audiovisual media are increasingly popularized.
<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
