A student is given two samples of carbohydrates. He tests to see if one is glucose and the other one is is starch. Describe the two chemicals tests he should use to identify each carbohydrate.

What is used to keep track of the gamates and possible offsprings combination

Ialready know the answers to these questions and they are on the attachment. but i just need to know why that answer is the correct one. plz asap! this is for a report that i need to email by 10!

Astudent poured a solution of bromothymol blue indicator into three test tubes. then he placed an aquatic plant in two of the test tubes, as shown below. he placed a stopper on each test tube and placed them all in the dark for 24 hours. bromothymol blue turns from blue to yellow in the presence of co2