Over evolutionary time, flowering plants have
evolved colors, odors, and nectar that attract
pollinating insects and the insects have evolved
mechanisms that detect the changes in plants
and to better collect pollen. This is an example
of
a. exaptation.
b. phylogenetic change.
c. coevolution.
d. convergent evolution.
e. sympatric speciation
C
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The purpose(s) of two circuits in a closed circulatory system is to ____
a. collect and distribute blood within the heart b. take blood to and from all parts of the body c. take blood to and from the lungs d. keep oxygenated and deoxygenated blood separate e. allow oxygenated and deoxygenated blood to mix
In the figure, the decrease of herbs (grasses) and increase in mosses would suggest that the climate in Siberia has become in the past 10,000 years.
A. drier B. wetter C. hotter D. more windy
What key research question was addressed by King and others while studying sponges?
A. Do the genes of sponges contain information that might explain the rapid evolution of animal groups during the Cambrian explosion? B. How similar is the DNA of living marine sponges to that of fossil sponges from the Cambrian? C. Why were the sponges an evolutionary dead end, with little change and diversity since the Cambrian? D. Did sponges survive the precambrian mass extinction, with genes unique from other animal groups? E. Were the sponges the last common ancestor of eumetazoans?
Researchers tend to name genes based on what
happens in their absence. The tinman gene in Drosophila results in flies a. without hearts. b. with nonjointed legs. c. with a thick exoskeleton. d. with rust colored eyes. e. without brains