Which heart chamber is the most muscular?
A) Right ventricle B) Left ventricle C) Right atrium D) Left atrium
B
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Where is the glycolysis pathway located in a cell?
A. Cytoplasm B. Smooth endoplasmic reticulum C. Cristae of the mitochondria D. Matrix of the mitoconddria
Loading of most carbohydrates produced by photosynthesis into companion cells at a source occurs by
a. osmosis. b. proton pumping. c. suction from unloading at a sink. d. active transport. e. diffusion of water from the xylem.
Mendel’s principle of independent assortment is explained by which metaphase I event?
a. separation of homologous chromosomes b. crossing-over c. synapsis d. cytokinesis e. random orientation of homologous chromosomes on the metaphase plate
The virus HIV, which causes AIDS, infects:
A) mast cells. B) T cells. C) B cells. D) phagocytes.