Answer:
DNA is located in the nucleus, but can also be found in other cell structures called mitochondria. Since the nucleus is so small, the DNA needs to be tightly packaged into bundles known as chromosomes.
Explanation:
Answer:
The mitochondrial DNA (mtDNA) is passed down from the mother to the children almost unchanged. The analysis of mtDNA has provided the forensic scientist with essential tools for determining the source of DNA that they have recovered even from small biological samples. Thus, the answer to the question above is letter B.
Explanation:
Answer:
LD50 (median lethal dose)
Explanation:
- Whenever one needs to quantify the virulence of a pathogen then this is done by using a set of laboratory animals.
- LD50 (median lethal dose) is an important indicator of virulence.
- LD50 is defined as the number of pathogens that are required to kill 50% of the total infected animals.
- For the calculation of LD50, the animals are infected with a known number of pathogens and then a graph is plotted for the percentage of animals killed against the concentration of the pathogen used for infection.<em> The point at which the graph indicates the death of 50% animals, the corresponding concentration of inoculation of a pathogen is taken as the LD50 of that particular pathogen. </em>
Answer:
Bread mold is an example of Zygomycota phyla of the fungi.
Explanation:
Zygomycota is known as conjugated fungi including molds, for example which invading breads and other food products. Identify character of Zygomycota are during sexual reproduction formation of zygospores, and the lack of hyphal cell walls except in reproductive structures.
The classification of the fungi is based on the sexual reproductive structures.
Zygomycota reproduces by two methods sexually with diploid spores known as zygospores and asexually with sporangiophore. Black bread molds, for example Rhizopus stolonifer is common known species of this phylum. Member of this phylum can cause food spoilage includes Mucor, Rhizomucor, or Rhizopus and diseases.
