When a drop of food coloring is placed in a container of clear water, the colored dye molecules ____
a. undergo osmosis to a different location
b. undergo active transport to a different location
c. diffuse to the top of the container
d. diffuse equally throughout the container
e. stay at the bottom of the container
D
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In the rumen, food is quickly attacked by cellulase
A. enzymes produced by microbes. B. archeons. C. enzymes produced by both the ruminant and the microbe. D. enzymes produced by the ruminant.
Osmometer cells in the brain sense an increase in the salt concentration of plasma. This information is sent to the hypothalamus, which notifies the pituitary gland to release the hormone, ADH. ADH causes the kidney to save water, which lowers the salt concentration of the plasma. What characteristic of life does this overall pathway represent?
A. Sensitivity B. Energy utilization C. Cellular organization D. Homeostasis E. Evolutionary adaptation
As cells enter mitosis, their microtubules disassemble and then reassemble forming the mitotic spindle with a focus at the ________, a special animal cell microtubule-organizing structure.
a) kinetochore b) centromere c) centrosome d) kinetosome e) chromosome
What type of immunity results from recovery from an infection such as the chickenpox?
a. naturally acquired active immunity b. naturally acquired passive immunity c. artificially acquired active immunity d. artificially acquired passive immunity