CST Biology PASSED Exam Questions and CORRECT Answers

Two students were testing the amount of fertilizer that would best promote the growth of strawberries in a garden. Which of the following could be an unavoidable source of experimental error? - Variation in the strawberry plants Both petri dishes with a dilute solution of iodine to indicate the presence of starch. The surface of petri dish 1 turned completely blue, indicating starch. Most of the surface of petri dish 2 was blue, except the letter was clear. The most probable explanation of the clear x is that.. - a chemical in the saliva broke down the starch in the gel In most stable fresh water environments , populations of Daphnia are most entirely female and reproduce asexually. However males are observed in low oxygen environments or when food is scarce. Based on these observations, a researcher suggests that male Daphnia develop in response to unfavorable environmental conditions. This is an example of a - hypothesi