Viruses are considered non-living because they do not have a biological machinery to replicate, and they do not have a metabolism.
They replicate by using the host cell
Virus do not consume energy to survive or regulate its own temperature
This is because maybe that allele for the trait is recessive and the person is heterozygous.
If the person is heterozygous, it means that they have both the dominant and recessive allele for a trait. And by dominant and recessive, if dominant allele exists, no matter if recessive allele exists or not, the characteristic controlled by the dominant allele must be shown. This is their phenotype, which is the observable characteristics.
For example, there are 2 alleles for controlling the eye color. Brown allele is dominant, while blue is recessive. Just like the question above, if the person has an allele for blue eye color, but they have the brown color allele too, their phenotype would be brown eye color, as the brown color is dominant over blue eye color. This matches the requirements of having the allele for a particular trait but not showing the phenotype of that.
The correct answer is option D
The main cause of global warming is the green house gases that contributes more towards global warming.
The carbon dioxide produced from the transportation is the main green house gas. Transportation being the major source of carbon dioxide contributes towards global warming.
Reducing the amount of green house gases will help in the reduction of the global warming.
