Nitrogen fixation in the hindgut of the termite is carried out by ________.
A. deinococci
B. Bacteroides
C. cyanobacteria
D. spirochetes
Answer: D
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In a _____ circulatory system, circulation of blood is more controlled—the blood is moved faster and more efficiently than in other types of circulatory systems. Â
Fill in the blank(s) with the appropriate word(s).
In which structure of the digestive tract does digestion of starches begin?
a. in the esophagus b. in the large intestine c. in the mouth d. in the small intestine
There are currently many similar-looking but different species on either side of the Isthmus of Panama. They most likely resulted from
A) allopatric speciation. B) random mutations. C) hybridization. D) sympatric speciation. E) temporal isolation.
Arabidopsis thaliana has homologous gene clusters to the Hox genes found in Drosophila. What are these master regulatory clusters called?
A) MRCs B) MADS-box proteins C) CURLY LEAF genes D) Hox genes