Homo heidelbergensis is believed to be the ancestor species of
A) Homo sapiens.
B) Homo neanderthalensis.
C) Homo neanderthalensis and Homo sapiens.
D) Homo ergaster and Homo sapiens.
E) Homo ergaster.
C
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In placental mammals, how does the fetus obtain nutrients and oxygen?
A. Maternal veins and fetal arteries are directly connected in the chorionic villi. B. Diffusion into the umbilical capillaries from maternal blood surrounding the chorionic villi. C. Maternal blood cells are carried across the fetal capillary walls through special pores. D. Maternal arteries and fetal veins are directly connected in the chorionic villi. E. Diffusion into the umbilical cord from maternal blood surrounding the chorionic villi.
A steady, low-level contraction of a muscle is referred to as
a. tetanus. b. treppe. c. spasm. d. tone. e. fatigue.
Which of the following statements about photophosphorylation is FALSE?
A) Light liberates an electron from chlorophyll. B) The oxidation of carrier molecules releases energy. C) Energy from oxidation reactions is used to generate ATP from ADP. D) It requires CO2. E) It occurs in photosynthesizing cells.
A patient presents with airway narrowing, cleft palate, colobomas, and conductive hearing loss. The patient is diagnosed with Treacher-Collins Syndrome, which may also present with which of the following?
A. Cognitive Disabilities B. Micrognathia C. Preauricular Tags D. Prominent Overbite E. Tetralogy of Fallot