Which criteria are used to classify amphibians into orders? A. whether they reproduce sexually or asexually
B. whether they live on land or in the water
C. whether they have a backbone or not
D. whether there are legs or not, what the legs look like, and what those legs do

Wikipedia aswell can be used to solve the following questions

Glucose, also called grape sugar, blood sugar or corn sugar, is among the simplest and one of the primary naturally occurring sugars. produced naturally by plants as the primary photosynthesis product, it is heavily used by living beings as a main energy source and is necessary for cellular respiration. chemically, it is a monosaccharide carbohydrate and serves as a building block for complex sugars like starch.