What is a "reaction norm?"
A. A character that originally developed in response to the environment that has become genetically determined
B. The complete set of interacting genes necessary to produce a developmental module
C. The complete range of phenotypes that an organism can produce in different environments
D. When the effect of environmental differences on the phenotype differs from one genotype to another in a population
E. The ability to produce the same structures and morphology, regardless of environmental differences
Answer: C. The complete range of phenotypes that an organism can produce in different environments
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Paramyxoviruses evade the host immune system by
A. a display of host antigens on its surface. B. entering new cells by inducing syncytia formation. C. producing an inhibitor specific for lymphocyte receptors. D. infecting only red blood cells.
Four of the following describe a bilaterally symmetrical animal. Which one is the exception?
a. It has left and right sides. b. It usually displays cephalization. c. It produces mirror images regardless of the number of "cuts" through the central axis. d. It usually has a three layer body plan. e. It can be a deuterostome.
Innate immunity is not effective against fungus infections
Indicate whether the statement is true or false
Some types of gene are more highly conserved than others. For each of the following pairs of gene functions, choose the one that is more likely to be highly conserved
A. genes involved in sexual reproduction / genes involved in sugar metabolism B. DNA replication / developmental pathways C. hormone production / lipid synthesis