Which of the following is a correct interpretation of the wings of bats and the wings of birds?
a. They are analogous because they have a similar internal bone structure inherited from a common ancestor.
b. They are homologous because they are adapted for the same function.
c. They are homologous because they have a similar internal bone structure inherited from a common ancestor.
d. They are analogous because the common ancestor of bats and birds had wings.
Answer: c. They are homologous because they have a similar internal bone structure inherited from a common ancestor.
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Which process is responsible for the release of neurotransmitters from the presynaptic neuron into the synapse?
a. diffusion b. endocytosis c. exocytosis d. fusion e. synaptic release
What macromolecule is made from the instructions contained in a typical gene?
A) ATP B) phospholipid C) polysaccharide D) protein
On a field study in Costa Rica, you discover a new species of frog! After careful work to determine the size and range of the population, you conclude sadly that the species has very few individuals in an ever-shrinking limited range. The entire species could be wiped out at any time. When you write up your report on the frog, how should you describe its status?
A. Threatened B. Endemic C. Extinct D. Conservative E. Endangered
Which of the following would be revealed by a comparison of a cancer cell and a normal cell?
a. Regulation of mitosis is strictly regulated in cancer cells; mitosis is unregulated in normal cells. b. Cancer cells undergo contact inhibition; normal cells do not. c. Cancer cells do not undergo contact inhibition; normal cells do. d. Cancer cells cannot metastasize; normal cells can.