Which is true of agar a. It is used to solidify microbiological media b. It is a complex carbohydrate extracted from a marine alga. c. It resists degradation by most bacteria. d. All of the above is true.

The chocolate agar medium contains chocolate as nutrient source for bacterial growth. Group of answer choices True False

Mannitol salt agar is classified as a complex medium. Group of answer choices True False

Mannitol Salt Agar (MSA) differentiates among bacteria based on their ability to ferment mannitol.Group of answer choicesTrueFalse

Describe the molecular composition & characteristics of amorphous ground substance (AGS) & how they relate to function

Mrs. Singh asked her class to pair up and investigate anything in the Unit 1 & 2 Biology course, then present their results to the class to teach them the concept they investigated. Fabiano and Axel did an experiment in their class looking at how quickly a substance can move through different sized agar blocks. They used phenolphthalein-rich agar, which is an indicator that changes colour from pink to clear when levels of acidity change, and sodium hydroxide solution, which has a low acidity level to show the movement of solution.They used three agar blocks, a 1 cm × 1 cm × 1 cm cube, a 2 cm × 2 cm × 2 cm cube, and a 3 cm × 3 cm × 3 cm cube.State the independent variable and the dependent variable in this experiment.