Animals exchange heat with their environment by which of the following processes EXCEPT?
a. conduction
b. radiation
c. evaporation
d. convection
e. thermoregulation
E
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Through studies using the animal cap assay this morphogen was shown to be important for the determination of the different types of mesoderm tissue in the developing embryo.
A. activin B. noggin C. Spemann's organizer D. Hox gene E. cadherins
Living at high altitudes can cause ____ as a respiratory adaptation
a. elevated erythrocyte count b. decreased number of alveoli c. decreased number of lung capillaries d. hemoglobin molecules with less affinity for O2 e. decreased erythrocyte count
The impact of natural selection is demonstrated by
a. directional selection. b. stabilizing selection. c. neutral selection. d. disruptive selection. e. directional selection, stabilizing selection, and disruptive selection.
Which of the following infectious particles is most susceptible to damage?
A) naked capsid virus B) enveloped virus C) prions D) bacteriophage E) both naked capsid viruses and prions