Answer: A
. the history of the Hoover Dam and its impact on the Southwest region.
Explanation:
This question is based on the article, ''The Hoover Dam'' by Michael Stahl. In it the author begins by describing what hydroelectricity is and how it came about.
The author then used the Hoover Dam to illustrate the points made about hydroelectricity by first giving a brief history of the construction of the dam and the sacrifices it took to build it. The impact the dam had on the area it supplies - the Southwest - was also analysed.
Answer:
Option 3. Genetic material
Explanation:
Answer and Explanation:
All the components a prokaryotic cell can have are:
- Plasma membrane
- Cell wall
- Capsule
- Cytoplasm
- Nucleoid (where DNA is, it is not an actual nucleus)
- Plasmid
- Ribosomes (for protein synthesis)
- Pillus or Pili
-Flagellum or flagella
-Fimbria or fimbriae
A typical prokaryotic cell have plasma membrane, cytoplasm, nucleoid (genetic material) and ribosomes. Some prokaryotic cells have also cell wall, capsule, plasmids, pili, fimbriae and flagella and these components can be used for the cell to survive to unfavourable conditions.
Cell wall mantains the shape of the cell, prevents dehydratation and gives extra protection. Capsule is useful for the cell to attach surfaces. Plasmid is a circular molecule of DNA which is able to replicate independently of the chromosome (in nucleoid) and it can be transfered through a pillus to another prokaryotic cell. Plasmid can contain a gene that confers bacteria an antibiotic resistance, so if the cell posses the plasmid, it is resistent to the antibiotic. Flagellum is used for locomotion (to move on in a medium) and fimbriae are used to attach to surfaces.
I think the correct answer from the choices listed above is option C. <span>Large doses of antibiotics given to fight an infection are likely to destroy bacteria that produce vitamin K. The digestive organ that would benefit from this bacteria would be the liver.</span>
