What do ribbon worms use to feed?
a. Proboscis
b. Cilia
c. Pharynx
d. Radula
a
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Squids and octopuses move by means of water movement through their
A. tentacles. B. cilia and flagella. C. modified mantle cavity. D. muscular foot. E. radula.
Which of the following occurs in the cytosol of a eukaryotic cell?
A) glycolysis and fermentation B) fermentation and chemiosmosis C) oxidation of pyruvate to acetyl CoA D) citric acid cycle
What is a pyrimidine dimer?
A) A hydrogen bond between adjacent pyrimidines B) An electrostatic bond between adjacent pyrimidines C) An ionic bond between adjacent pyrimidines D) A covalent bond between adjacent pyrimidines
Choose the most correct statement concerning capillaries.
A. Networks of capillaries are called capillary nets. B. Precapillary sphincters contract to increase capillary flow. C. Almost all capillaries are open at the same time. D. The walls of capillaries contain smooth muscle. E. The site of nutrients, gas exchange, and waste exchange is the capillaries.