Skeletal muscles become more resistant to fatigue following ____ exercise
a. high intensity-short duration
b. low intensity-long duration
c. medium intensity-medium duration
d. high intensity-long duration
e. low intensity-short duration
ANSWER: b
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In which type of microscopy is a beam of electrons used to scan the specimen, followed by the conversion of the
excited electrons to a three-dimensional image?
a. confocal laser scanning microscopyb. phase-contrast microscopy c. bright field microscopy d. scanning electron microscopy e. fluorescence microscopy
A sign that mutation occurred in a person exposed to radiation in the aftermath of the Chernobyl disaster of 1986 was
A) acute radiation sickness in the exposed person. B) short DNA repeats in a child's genome that didn't match the size in either exposed parent. C) increased rates of asthma and allergies in the exposed people and their children. D) a child that failed an Ames test.
Studies of human egg formation have shown that at ovulation the egg cell is stuck in metaphase II and
only completes meiosis if a sperm enters the egg. In metaphase II, chromosomes are tightly condensed, so you should expect to find ____ in human egg cells that have not been entered by sperm.
a. very high levels of gene expression b. mostly euchromatin c. very little gene expression d. no nucleosomes e. no solenoids
You identify a new unicellular organism with multiple chromosomes organized by proteins within the cell's nucleus. Into which of the three domains of life might this organism fit?
A) Archaea B) Bacteria C) Eukarya D) Archaea or Bacteria E) Archaea or Eukarya