Benedict’s solution is an alkaline copper sulfate solution which is used to detect the presence of aldehyde groups. in the presence of benedict’s solution, the aldehyde group is oxidized and the aqueous blue cu2+ ion is reduced to a red cu2o precipitate. sugars such as glucose, which produce the red precipitate when benedict’s solution is added, are called reducing sugars because they can reduce cu2+ to cu+. which of the following carbohydrates would give a positive reaction with benedict’s reagent? a. galactose; b. sorbitol (see below); c. β-ethylglucoside; d. gluconate .

Populations of blue-winged warblers, a type of bird, migrate south in the winter and return to canadian breeding grounds in the spring. as global temperatures have increased due to climate change, spring has started arriving in the warbler's breeding grounds earlier in the year, before the warblers return. warblers now arrive at their breeding grounds too late to select ideal nesting sites and to feed on important early-spring food sources how are populations of blue-winged warblers most likely to be affected by the earlier arrival of spring? o a. populations will go extinct since the warblers will stop migrating to breeding grounds. b. populations will be unaffected since most species can quickly adapt to effects of climate change. c. populations will increase since warmer temperatures are generally beneficial to survival, d. populations will decline since individuals will be less likely to successfully reproduce, reset next

Indicate the coat color and the proportion of offspring with that color for each of the following crosses of rabbits. assume all are homozygous. agouti x albino a) 1/2 albino, 1/2 agouti b) all agouti c) 3/4 agouti, 1/4 albino

What are some natural processes that represent physical and chemical changes?