Coronavirus is the answer .
<span>The more similar the embryonic development of two species, the more closely they are related.</span>
In photosynthesis, light and CO2 are required in order to perform properly. Thus, if only low levels of light are present, the process of photosynthesizing will produce inaccurate and slow results due to the imbalance of materials the plants is using. The plant should have a balanced amount of CO2, light, and water in order to find the ideal levels of CO2.
Thomas Hunt Morgan used fruit flies to study genetics for several reasons. First, fruit flies have a short life cycle that lasts an average of just 30 days. This means genetic traits can be studied over dozens of generations in the course of a year. This rapid reproductive cycle is impossible to match in any mammalian model, even mice or rats. Second, fruit flies produce huge numbers of offspring.
The correct option is COAL.
Fuels are considered to be harmful to the atmosphere because of the carbon dioxide and other gases which are released into the atmosphere when these fuels are burned. Out of all these gas pollutants, carbon dioxide is the major pollutant of the atmosphere. Coal is considered to be the most harmful to the atmosphere because, its carbon dioxide content is much higher that that of the other fuels.<span />