Answer: The bacteria uses the oxygen present in the mouth.
Explanation:
The plaque that is formed in the teeth is a highly anaerobic bacteria but it can sustain in the environment rich in oxygen. The oxygen is used by the bacteria and there is a absence of oxygen in the teeth.
It is formed in between the teeth which needs oxygen to survive and if remains for tooth for a longer period of time then it began to grow without oxygen.
It basically uses the oxygen available in the mouth and makes the condition anaerobic.
B. to make cellulose in the cell walls
Answer:
The correct answers is - Organism > Cell > Chromosome > gene > nucleotide.
Explanation:
Organisms are the largest among all these as they are made up of organs that made up of tissues and tissues are made up of cells. Cells are the second largest item among these items which contains various components in them and known as a unit of the structure of organisms.
In cells chromosome presents that are made up of protein and DNA, a particular sequence of DNA is known as gene, therefore, it is smaller than the chromosomes and in the last monomer of the DNA which is nucleotide made up of phosphate group, sugar and nitrogenous bases.
The correct answer is option C. the variety of the organisms.
The population size can be defined as the actual number of the individuals present in an organism. The presence of the variety of the organism does not effect the population size as they do not have any effect on the reproduction.
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Reason for the incorrect answers:</h3>
The total number of the organism has a direct impact on the population size of the organism. In case, the total number of the organism is high, the population size would increase at a higher rate, and if the total number of individual are less than the population would not increase at a higher rate.
The available water supply and adequate shelter would also effect the size of the population. In case, the adequate shelter and the water supply would be available, then in the presence of the abundant resources, the organism would reproduce at a higher rate and the population size would increase, and the opposite occur in lack of resources, in the absence of adequate resource, the organism reproduce at a slower rate and mortality can be high.
When scientists say they share a universal genetic code it means that all organisms it can mean either DNA as the main source of hereditary information in all life forms we know of or more likely that all organisms we know of use a three base pair code for the synthesis of proteins, DNA produces mRNA. This mRNA is read three base pairs at a time by a ribosome and this is called the genetic code.
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