When a suspension of green algae is illuminated in the absence of co2 and then incubated with 14co2 in the dark, 14co2 is converted to [14c]glucose for a brief time. what is the significance of this observation with regard to the co2-assimilation process, and how is it related to the light reactions of photosynthesis? why does the conversion of 14co2 to [14c]glucose stop after a brief time?

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na

Ans. : frostbite is when exposure to cold temperatures causes freezing to the skin or other tissues. it most commonly affects the hands, feet, and face. the longer areas are exposed to cold, typically the worse the frostbite. the water temperature used for rewarming a frostbitten part should be : (102 -105) f degrees.