The ________ is the only facial bone with a sinus.
Fill in the blank(s) with the appropriate word(s).
maxilla
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The reason for fetal globin chain switching is that
A) a fetus has four alpha globin chains and a newborn has four beta globin chains. B) a fetus's blood is clear until the sixth month and then globin chains turn it red. C) the newborn needs more iron than the fetus or embryo. D) the embryo and fetus receive different concentrations of oxygen compared to after birth.
What characteristic does not describe a vertebrate?
a. notochord. b. backbone. c. exoskeleton. d. gills or lungs. e. posterior tail.
Which of the following characteristics helps differentiate between a monocot and a dicot?
A) Presence or absence of pollen grains B) Presence or absence of an apical meristem C) Seeds covered by a fruit D) Number of flower parts E) Presence of vascular tissue
The system of fungal filaments that penetrates and grows through the substrate is called a(n)
A. hyphal compartment. B. mycelium. C. mushroom. D. exoskeleton. E. sporangium.