A mutant Drosophila is created that has double the number of bicoid genes, each of which is fully expressed. What is the most likely difference expected in this mutant compared to wild type Drosophila embryos?
A. Hunchback levels would be lower in the anterior portion of the embryo.
B. Caudal levels would be higher at the anterior portion of the embryo.
C. Less of the embryo would have posterior structures.
D. The Bicoid concentration gradient would be less at the anterior portion of the embryo.
C
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The sac fungi are distinguished from all other groups of fungi because their reproductive structures are ________.
A. inside an ascus B. zygospores C. motile D. borne on basidia
What is an example of an extrinsic control of cycles in population size?
a. the relationship between a species and its predators b. hormonal changes c. dispersal d. population density e. a single reproductive event
Contrast negative (repressor) and positive (CAP) control in the lac operon
What will be an ideal response?
Bacteria can act as probiotic agents, such as species of ________ added to yogurt, to help impart health effects to the intestinal tract.
What will be an ideal response?