Darwin realized that changes that have occurred in species over time are the result of:
a. transformational processes.
b. natural selection.
c. ongoing processes easily observable during a lifetime.
d. traits acquired during a lifetime passed on to progeny.
B
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What part of an olfactory receptor neuron contains odorant receptors?
A. axon B. soma C. cilia D. synapse E. oligodendrocyte
What organelle and function pair best explains their ability to divide?
A. Chloroplasts and peroxisomes because they both have their own DNA. B. Mitochondria and chloroplasts due to their association with endosymbiosis theory. C. Ribosomes and mitochondria as each is a result of regression theory. D. Peroxisomes and lysosomes are both derived from engulfed bacteria.
When comparing gene regulation in prokaryotes and eukaryotes,
a. both significantly remodel chromatin b. both have transcription and translation in separate cellular compartments c. both produce differentiated cells d. both use transcription control e. both have alternative splicing
Each summer, a large "dead zone" devoid of fish and other animals develops where the Mississippi River flows into the Gulf of Mexico. What causes this?
A) Large quantities of fertilizer run off from Midwestern farm fields into the Mississippi River. B) Global warming is making the river water too hot for the fish to tolerate. C) High levels of pesticides are used in the Mississippi River basin. D) There are high levels of mercury in the river water. E) Acid rain makes the gulf's water too acidic to support fish.