Cell energy can be extracted from which of these?
A. iron
B. water
C. carbohydrates
D. All of these answers are true.
C. carbohydrates
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Why does the eyecup of the flatworm only detect light and dark, not images?
A. There are too few photoreceptors. B. There is no lens. C. The eyecup is lined by a pigmented epithelium. D. Flatworms do not have a brain.
Animals, fungi, and many bacteria that use organic molecules as a source of both energy and carbonare:a
photoautotrophs. b. catabolic autotrophs. c. chemoheterotrophs. d. photoheterotrophs. e. chemoautotrophs.
Simple epithelial cells of the renal tubule have abundant ____ to increase the surface area for reabsorption and
numerous ____ to provide energy for actively transporting materials. a. microvilli; mitochondria b. cilia; mitochondria c. microvilli; Golgi complexes d. cilia; Golgi complexes e. cilia; capillaries
Foreign substances that elicit an immune response are called:
A. Antibodies B. Interleukins C. Cytokines D. Antigens