Chronic myelogenous leukemia is caused by a translocation that creates
A) a proto-oncogene.
B) a fusion protein that acts like a transcription factor, activating cell cycle control genes.
C) a protein that increases growth factor production.
D) a fusion protein that deregulates the cell cycle of white blood cells.
D) a fusion protein that deregulates the cell cycle of white blood cells.
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According to the multiregional hypothesis of human origins, modern H. sapiens evolved via _____ from _____ of H. ergaster
A. convergent evolution; multiple Old World populations B. adaptive radiation; a single Old World population C. parallel evolution; multiple Old World populations D. allopatric speciation; a single Old World population E. peripatric speciation; a single Old World population
Directional selection favors ____
a. intermediate phenotypes b. phenotypes at one end of the distribution c. phenotypic extremes at both ends
d. heterozygous individuals e. homozygous individuals
Which protein functions to break down clots after wounds heal?
A) plasmin B) prothrombin C) thrombin D) fibrinogen
Which one of the following most specifically explains why plants need water to perform photosynthesis?
A) to provide the oxygen needed to make sugars B) to add a hydrogen to NADPH C) to provide electrons for the light reactions D) to add a phosphate to ATP E) to excite electrons