Goot is conducting an experiment to see whether goldfish eat more flakes or pellets. He thinks that the fish will choose the flakes. Every day, Gooft places both flakes and pellets in a fish tank and observes which food the fish choose what evidence would be best for Geoff to collect as he observes the fish?
umber of fish in the tank
the time takes for the fish to finish eating
the number of th that cat cach type of food
the time to for the fish to choose what type of food to eat

The scheme below is from a series of reactions that are part of a synthesis of vitamin a. answer the following questions with reference to this scheme. (i) what is "reagent a"? (ii) draw a step-by-step mechanism which explains the formation of compound c from compound b (iii) which reagents would you use to form compound e from compounds c and d (reagents b and c)? for each reagent suggested above in (ii) explain the role of the reagent in the reaction to (iv) form compound e. you may wish to do this by drawing a mechanism. 1. addition of reagent a но reagent a 2. н,о" thо oh нон-с compound a. compound b. compound c .ch-оh 1. reagent b "сно 2. reagent c сh oh compound e. compound d.