30. Which biological organizational level is most important for analyzing the transmission of COVID-19 virus among people within a community? A. organ level B.cellular level C.molecular level D. population level 31. What happens to solar radiation when it interacts with the Earth's atmosphere? A.It bounced back into space by greenhouse gases. B.It passed through the atmosphere without any interaction. C.It is absorbed by the atmosphere and re-emitted as visible light. D.It is absorbed by the Ear
Answer (1)
30. D. population levelTo analyze how COVID-19 spreads among people, scientists and health officials look at patterns in large groups. This means observing how many people get sick, how fast the virus spreads, and who is most affected. These are all concerns at the population level, which focuses on groups of people and their interactions.Other choices focus on smaller levels:Organ level looks at body parts like lungs or heart.Cellular level focuses on how the virus enters and affects individual cells.Molecular level studies the virus’s structure and how it works chemically.31. A. It is bounced back into space by greenhouse gases.When the sun’s energy (solar radiation) reaches Earth’s atmosphere, several things can happen:Some sunlight passes through the atmosphere and reaches the Earth's surface.Some is absorbed by the Earth, which warms up the planet.Some is reflected back into space, especially by clouds, dust, or gases in the atmosphere.
