Identify three different types of modified leaves and list the function of each. What will be an ideal response?
spines: deter herbivores
tendrils: help keep a vine attached to the structure on which it grows
bud scales: protect the apical meristem
bracts: associated with flower clusters (inflorescences)
bulbs: storage of food or water
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Which amino acid would Nirenberg and Leder have found when they used the triplet UAG?
A. Isoleucine B. Proline C. Lysine D. Threonine E. None of these
Which organizational unit includes the fewest species of organisms?
a. class b. biosphere c. community d. population e. ecosystem
Gene therapy is being explored as a means of permanently correcting a defective gene to cure a disease rather than to merely treat symptoms with drugs. Ideally, it would be best to correct these defective genes before a baby is even born. But if it's
possible to change diseased genes, what about changing genes that regulate other characteristics, such as height or eye color? Would it be desirable to change the genes of babies for more cosmetic purposes? What will be an ideal response?
Which of the following cannot be photoautrophs?
A. Algae B. Fungi C. Plants D. Bacteria E. All of the above can be photoautrophs.