Blood carries most nutrients straight from the small intestine to which organ?
A) the heart B) the liver C) the stomach D) the pancreas E) the kidneys
Answer: B
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Transmission and scanning electron microscopy differ because
A. transmission electron microscopy has high resolution, but scanning electron microscopy does not. B. transmission electron microscopy shows contrast, but scanning electron microscopy does not. C. transmission electron microscopy has much higher magnification than scanning electron microscopy. D. transmission electron microscopy shows two-dimensional ultrastructure, while the scanning electron microscopy shows three-dimensional structure. E. transmission electron microscopy uses light as an illumination source, while scanning electron microscopy uses electron beams as an illumination source.
A circulatory system that allows some mixing of
oxygenated and oxygen-poor blood is indicated by a. A. b. B. c. C. d. A and B. e. all of these.
What are the functions of helper T cells?
What will be an ideal response?
Changes to an organism's DNA can cause unexpected traits to be expressed in its offspring. DNA in an individual's gametes will most likely be altered before being passed to offspring if exposed to
A. x-rays B. loud sounds C. magnetic fields D. extreme temperatures