Answer:
Explanation: RNA is made in the nucleus. It is a single stranded copy of DNA. It gets edited by removing the introns (non coding region) and keeping the exons (coding region). The mRNA now leaves the nucleus to be read by the ribosomes.
Answer: C: The total mass of glucose and oxygen formed from photosynthesis is equal to the total mass of carbon dioxide and water used up during the reaction.
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.
Photosynthesis is a phenomenon in which green plants containing chlorophyll use sunlight as a source of energy to convert carbon dioxide and water to form glucose and oxygen.

Answer:
Thunderstorm form when warm,moist air rises into cold air
Answer:
Explanation:
The negative impact of tourism on marine ecosystems be minimized using following methods :- Government should put restrictions on tourist visits on some specific marine tourists spots and only allow only specific people to visit that area at a particular time.- All the marine ecosystems should be cleaned regularly and throwing of garbage should be banned.- Proper management system should be implemented for the protection of marine ecosystems.- Endangered species and coral reefs should be handled using preventive measures by the government.