Some research suggests that individuals who take both vitamin c and zinc at the onset of the common cold experience fewer cold symptoms and recover more quickly than individuals who do not take these nutrients. what is the best explanation of why vitamin c and zinc could reduce the intensity and duration of the common cold? a. vitamin c and zinc are required for the absorption of iron, which is needed by the immune system. b. both vitamin c and zinc are involved in immune system functions. c. vitamin c and zinc are required for the absorption of vitamin k, which is needed for wound recovery. d. both vitamin c and zinc are involved in wound recovery.

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).

sulfur dioxide

explanation: acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. these substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.

the answer would be 2, if crossing over doesn’t occur 2 out of 4 of the daughter cells will have that allele.

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