<h3><u>Answer;</u></h3>
Whereas segregational petites exhibited Mendelian inheritance, both neutral and suppressive petites followed non-Mendelian patterns that were consistent with the involvement of an extranuclear agent
<h3><u>Explanation</u>;</h3>
- Mutations that yield defective mitochondria are expected to make cells grow much more slowly. These mutants were called petites to describe their small colonies compared to large wild type colonies.
- Petite mutants could not grow when cells had an energy source requiring only metabolic activity of mitochondria - needed sugar as well which is part of glycolytic pathway.
- Segregational petites, segregated in mendelian manner during meiosis. mutations cause defects in genes in cell nucleus encode proteins necessary for mitochondrial function.
- Vegetative petite mutants do not segregate in mendelian manner; two types: neutral and suppressive; carry mutations in mitochondrial genome itself; when two yeast cells are mated, daughter cells inherit mitochondria from both parents.
- Neutral petites lack most of their mitochondrial DNA; when mated with wildtype, the wildtype give their mitochondria so all cells display a normal phenotype.
Answer:
It lacks a cytochrome oxidase for passing electrons to oxygen.
Explanation:
During aerobic respiration, the NADH and FADH2 formed during glycolysis and Kreb's cycle are oxidized through the electron transport chain. NADH and FADH2 pass their electrons to the molecular oxygen via four complexes electron transport chain. Cytochrome oxidase is also called a complex IV of the electron transport chain. It serves to carry the electrons from cytochrome c to molecular oxygen, reducing it to H2O.
In the absence of cytochrome oxidase, electrons from NADH and FADH2 will not be passed to the molecular oxygen. Oxidation of NADH and FADH2 is required to continue glycolysis and Kreb's cycle. Therefore, in the absence of cytochrome oxidase, the cells will perform anaerobic respiration to oxidize NADH into NAD+ so that glycolysis can be continued as a source of energy.
Answer:
Global warming.
Explanation:
Because it is an ecological problem that could be studied by modeling more easily than by observation or experimentation, because it occurs over a large area and a long period of time
Answer:
there is nothing for me to see
Explanation:
The correct answer is Robert Koch.
He was a German scientist and is globally known as one of the fathers of microbiology and bacteriology. He is famous for his work with anthrax, finding out the causative agent of the fatal disorder to be Bacillus anthracis. He received a Noble prize for his work in 1905. He also gave four postulates known as Koch's postulates.
The four characteristics that were formulated by Robert Koch to determine the causative agent of a specific disorder are:
1. The pathogen or microorganism must be must be found in all the cases of the disorder.
2. The pathogen can be withdrawn from the affected host and can be developed in pure culture.
3. The pathogen from the pure culture must result in a disease when incorporated into a vulnerable, healthy laboratory animal.
4. The pathogen must be reisolated from the novel host and demonstrated to be similar to the originally inoculated pathogen.