How is an average person able to sense and discriminate between about 10,000 different odors?
What will be an ideal response?
When you recognize an odor, such as the scent of a rose, you are responding to a distinctive mix of odorant molecules. These molecules excite a unique subset of your nose's sensory neurons, thus triggering a unique pattern of excitation in the cerebral cortex. Through experience, your brain has come to associate this pattern of excitatory signals with its source.
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Which group of bacteria uses oxygen as a terminal electron acceptor and grows well in ambient air?
a. Aerobes b. Anaerobes c. Capnophiles d. Microaerophiles
In 1908 Orla-Jensen suggested that bacteria be grouped according to their
A. arrangement. B. morphology. C. physiology. D. Gram stain.
Fascicles contain many ________ bound in a connective tissue sheath.
Fill in the blank(s) with the appropriate word(s).
__________ are alternative forms of a gene that govern the same feature, such as eye color, and
occupy corresponding positions on homologous chromosomes. a. Alleles b. Loci c. Homozygotes d. Coupled traits e. None of these