Amyloid plaques are routinely found in the brains of individuals affected by _____________________, where they
cause nerve cell degeneration and death. Fill in the blank(s) with the appropriate word(s).
Alzheimer disease
AD
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Collecting data without a specific hypothesis in mind is called ______.
A. reductionism B. hypothesis testing C. discovery-based science D. theoretical E. All of these choices are correct
Which of the following are intermediates in or products of meiosis?
a. male gametes b. spermatids c. sperm d. secondary spermatocytes e. spermatogonia
Engelmann concluded that chlorophyll in the chloroplasts is responsible for photosynthesis based on
the following results:a. Spirogyra cells each contain a long, spiral-shaped, emerald-green chloroplast embedded in the cytoplasm. b. The action spectrum of photosynthesis matched the maximum production of oxygen by Spirogyra, observed by the greatest accumulation of bacteria in the blue and red regions of the spectrum. c. Bacteria exposed to the action spectrum for photosynthesis showed no preference to any particular color of light. d. Accessory pigments transfer some of the energy of excitation produced by green light to chlorophyll molecules. e. Protons flow through the ATP synthase complex.
Oxygen is necessary for cellular respiration because oxygen
A) combines with carbon to form carbon dioxide. B) reduces glucose to form carbon dioxide and water. C) combines with electrons to form CO2. D) combines with electrons and hydrogen ions to form water. E) combines with carbon dioxide and water to form glucose.