In support of the Recent Africa Origin hypothesis, the oldest dated fossils of H. sapiens found in Africa are reliably
dated at 100,000 years old.
____________________ Indicate whether the statement is true or false.
False - 195,000 years
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A student carries out PCR using the following steps: Step 1: 94°C for 1 minute Step 2: 60°C for 30 seconds Step 3: 72°C for 30 seconds Which of the following lists the CORRECT terms for these three steps?
A. denaturation of the double-stranded template, extension of the new DNA molecules, primer annealing B. degradation of the template, primer annealing, extension of the new DNA molecules C. denaturation of the double-stranded template, primer annealing, extension of the new DNA molecules D. denaturation of the double-stranded template, extension of the new DNA molecules, hybridization of the template E. hybridization of the single-stranded templates, primer annealing, extension of the new DNA molecules
Give an example of behavioral isolation.
What will be an ideal response?
What statement does NOT correctly describe antidiuretic hormone?
A. It ultimately acts to reabsorb more water. B. It inhibits the synthesis of aquaporins. C. ADH secretion is stimulated by high blood osmolarity. D. It binds to membrane receptors of cells in the mammalian kidneys. E. Damage to the posterior pituitary will decrease the production of ADH.
Predict what would happen if the proximal convoluted tubule of the nephron lost its ability to reabsorb materials.
A. Glucose, K+ ions, Na+ ions, and HCO3- ions would be lost unnecessarily. B. The volume of the urine would increase dramatically. C. Glucose would lost unnecessarily. D. Nitrogenous wastes would accumulate dramatically in the blood. E. K+ ions, Na+ ions, and HCO3- ions would be lost unnecessarily.