Describe why many systematists adopt the principle of parsimony
What will be an ideal response?
ANSWER: The analysis of character traits is complicated based on the number of possible
phylogenetic trees that could be produced from data. The principle of parsimony suggests
that the best phylogenetic tree is the one that hypothesizes the smallest number of
evolutionary changes needed to account for the distribution of character states within a
clade.
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Which of the following is considered to be a plant behavior?
A. response to sunlight B. response to plant hormones C. response to touch D. response to gravity E. all of the choices
The Nernst equation is used to calculate the ____
a. action potential b. equilibrium potential c. membrane potential of a neuron at rest c d. membrane potential of a hyperpolarized neuron e. membrane potential of a depolarized neuron
Error bars on a graph indicate
a. places where the data is likely wrong. b. places where the researcher is unsure of her results. c. variation in results that cannot be accounted for. d. variation in a set of data around the average. e. poor experimental technique on the part of the researcher.
From which vesicle does the neurohypophysis (posterior pituitary) descend?
A. Diencephalon B. Mesencephalon C. Metencephalon D. Myelencephalon E. Telencephalon