The primary role of producers is the recycling of nutrients in an ecosystem.
Answer the following statement true (T) or false (F)
False
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One of the unexpected findings to occur in comparing mouse and human genomes is
A. that "junk" DNA may be more functional than we assumed. B. how incredibly different they are. C. that there is far more "junk" DNA than we ever thought. D. how similar some gene families are to their original transposons.
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
Molars and premolars are used to
a. grind food. b. bite off chunks of food. c. tear food. d. mince food. e. pulverize food.
Name the neuromuscular transmitter that is released into the synaptic cleft.
A. calcium ions B. creatine phosphate C. acetylcholine D. sodium ions E. ATP