Of the cellular blood components, ____ are the smallest in size
a. erythrocytes
b. leukocytes
c. platelets
d. albumins
e. lymphocytes
ANSWER: c
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Imagine that a researcher has discovered a 500 million-year-old leaf fossil from the Cambrian Period. He notices that the leaf had very few stomata compared to present-day leaves
What does this tell the researcher about atmospheric CO2 levels during the Cambrian Period? A. Atmospheric CO2 levels were higher during the Cambrian Period compared to today. B. Atmospheric CO2 levels were lower during the Cambrian Period compared to today. C. Atmospheric CO2 levels during the Cambrian Period were equal to present-day levels. D. Nothing, as CO2 was not part of Earth's atmosphere during the Cambrian Period.
If you eliminated all sources of calcium (dairy products, some vegetables) from your diet, the level of ____ would rise
in an attempt to supply calcium stored in your body to the tissues that need it.
a. aldosterone b. calcitonin c. mineralocorticoids d. parathyroid hormone e. GH
Trypsin and chymotrypsin digest
a. fats. b. proteins. c. nucleic acids. d. carbohydrates. e. vitamins.
Muscle tone keeps tendons taut as they cross joints
What will be an ideal response?