If nondisjunction occurs during meiosis I, ____
a. two gametes will be normal and two will be missing one chromosome
b. two gametes will be normal and two will have one extra chromosome
c. three gametes will be normal and one will have two extra chromosomes
d. all gametes will be normal
e. all gametes will be abnormal
e
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Predict what would happen if the proximal convoluted tubule of the nephron lost its ability to reabsorb materials.
A. The volume of the urine would increase dramatically. B. Nitrogenous wastes would accumulate dramatically in the blood. C. K+ ions, Na+ ions, and HCO3- ions would be lost unnecessarily. D. Glucose would lost unnecessarily. E. Glucose, K+ ions, Na+ ions, and HCO3- ions would be lost unnecessarily.
What is gross primary production?
A. The carbon fixed during photosynthesis. B. The carbon fixed after cellular respiration is accounted for. C. Energy released by primary consumers. D. Photosynthetic production plus energy recycled by detritivores.
Among prokaryotes, there are some that can live in every environment on earth.
a. true b. false
One hypothesis for Alzheimer's disease is that an abnormal form of an internal protein forms ________, which interfere with normal neuronal function.
Fill in the blank(s) with the appropriate word(s).