Similar body parts that reflect shared ancestry are called __________. Fill in the blank(s) with the appropriate word(s)
ANSWER: homologous structures
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The first complete plant genome to be sequenced was that of
a. Phaseolus vulgaris (kidney bean). b. Arabidopsis thaliana (thale cress). c. Zea mays (corn). d. Capsella burse-pastoris (shepherd's purse). e. Oryza sativa (rice).
Matching. Choose the one most appropriate answer
for each. Some letters may not be used. 1. ___ abscisic acid 2. ___ annual 3. ___ biennial 4. ___ coleoptile 5. ___ ethylene 6. ___ salicylic acid 7. ___ gibberellin 8. ___ auxin 9. ___ phytochrome 10. ___ circadian 11. ___ short-day plant 12. ___ target cell 13. ___ long-day plant 14. ___ Pfr 15. ___ vernalization A. flower each successive year or after several years of vegetative growth B. promotes cell elongation in stems C. has receptor sites for a particular hormonal message D. a hollow, cylindrical organ that protects young leaves growing within it E. blue-green pigment that absorbs light energy F. low-temperature stimulation of flowering G. stimulates stomata closure and might be involved in root geotropism H. stimulates fruit ripening I. reproduces in spring J. produces only roots, stems, and leaves the first growing season and produces flowers the second year K. occurring on a 24-hour cycle L. flowers in autumn M. a nonhormonal plant growth regulator N. lives for only one growing season O. promotes stem elongation in plants P. pigment involved in flowering process
The amplification of recombinant plasmids occurs by:
a. the growth of the plasmid DNA. b. DNA replication of plasmids outside a host cell. c. the process of growth and division of the host cell. d. transformation of bacterial cells. e. the polymerase chain reaction.
A mutation in the gene for hormone A causes it to be unable to bind to its receptor protein. What do you predict will likely happen?
A) The receptor protein will not be activated and therefore will not initiate a signal transduction pathway. B) The receptor protein will change shape in order to bind with hormone A. C) The hormone will bind with a different receptor instead.