Excreting ammonia directly into the environment (select all correct choices):
A. is energetically inexpensive.
B. requires high volumes of water.
C. is energetically expensive.
D. requires little water.
E. converts it into a less toxic form.
A,B
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Genetic variation in behavior occurs between species and within species. Describe the genetic basis for the difference in mating behaviors in closely related species of voles
What will be an ideal response?
Solutions that cause water to enter cells by osmosis are called
A) permeable. B) hypertonic. C) hypotonic. D) isotonic. E) hydrophilic.
Muscle cells are produced by
a. the ectoderm. b. the endoderm. c. the mesoderm. d. the ectoderm and endoderm. e. all of the germ layers.
What is the measure of disorder in a system called?
A.) free energy B.) second law of thermodynamics C.) catabolism D.) entropy E.) enthalpy