The thyroid gland arises from which of the following structures?
A. Endoderm of posterior midline tongue
B. Foramen Cecum
C. Isthmus
D. Parathyroid swellings
E. Pharyngeal Pouch IV
Answer: A. Endoderm of posterior midline tongue
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a. inhibitor b. regulatory molecule c. substrate d. coenzyme e. cofactor
The scientific name of an organism indicates its domain
Indicate whether this statement is true or false.
The stomach is involved in four of the following. Which one is NOT a function of the stomach?
a. It begins carbohydrate digestion. b. It mixes food. c. It stores food. d. It begins protein digestion. e. It regulates passage of food into small intestines.
Your biology professor takes the class on a field trip to a local lake. You spend an hour studying the lake and writing down all observations. You hypothesize that the lake is oligotrophic. Which observations would support this hypothesis? Check all that apply.
A. The lake has little planktonic growth. B. An oxygen probe reveals low oxygen content in the water. C. The lake has extensive aquatic plant beds. D. The shoreline is mostly rock and sand with very little vegetative matter. E. The bottom of the lake is easily visible.