Which subphylum includes the sea squirts?
a. Cephalochordata
b. Urochordata
c. Petromyzontoidea
d. Placodermi
Answer: b. Urochordata
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In the alveoli
A. oxygen diffuses into the blood while carbon dioxide diffuses out of the blood. B. oxygen diffuses out of the blood while carbon dioxide diffuses into the blood. C. both oxygen and carbon dioxide diffuse out of the blood. D. both oxygen and carbon dioxide diffuse into the blood. E. no exchange with the blood occurs.
What is the independent variable in this figure?
A. temperature B. amount of pollen collected C. glucose production D. rate of oxygen production E. rate of carbon dioxide production
Which of the following does not occur prior to or during stage 1 of labor?
A. uterine contractions B. effacement C. bloody show D. breaking water E. dislodging of the placenta
Acetyl is used during
A. the Krebs cycle. B. the electron transport system. C. glycolysis. D. fermentation.