For measuring water quality, which of the following LTB tubes should be subcultured?
A) Tubes that exhibit gas production
B) Tubes that do not exhibit gas production
A) Tubes that exhibit gas production
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Why is eating carrots thought to be useful for enhancing vision?
A. High levels of chlorophyll in carrots helps with photosynthesis in the eyes. B. High levels of beta-carotene can lead to the production of a pigment used in vision. C. High levels of carotenoids in carrots can allow vertebrate eyes to perform the dark reactions. D. High levels of NADPH in carrots can allow vertebrate eyes to perform the light reactions.
To what group did the earliest fossils of eukaryotes belong?
A. green algae B. red algae C. diatoms D. coccolithophorid algae E. dinoflagellates
Hydrogenation is a chemical process that
a. turns liquid oil to solid fats. b. turns amino acids into proteins. c. turns DNA into lipids. d. creates stable alternative energy sources. e. does none of these.
You find a unicellular organism that forms lobe-like pseudopodia. When you expose the cells to
cAMP, they aggregate into a slug like structure. Based on this information, you correctly conclude that this organism is: a. Entamoeba histolytica. b. Dictyostelium discoideum. c. Chaos carolinense. d. Chlamydomonas. e. Physarum polycephalum