Synthetic compounds similar to which type of plant hormone are used to prolong the shelf life of
vegetables such as lettuces and mushrooms and to keep cut flowers fresh?
a. salicylic acid
b. jasmonates
c. abscisic acid
d. gibberellins
e. cytokinins
E
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Which of the following are correct pairings of histone variants and their functions?
A. H3.3 ? stabilizes the open state (transcriptionally active) B. CENPA ? maintains kinetochore attachment C. H2AX ? DNA repair D. macroH2A ? X chromosome inactivation E. All of these choices are correct.
Which group of organisms is not classified as ectotherms? a. All of these choices are ectotherms
b. Fish c. Amphibians d. Lizards e. Mammals
The chromosomes are aligned at the spindle equator during
a. anaphase. b. metaphase. c. interphase. d. prophase. e. telophase.
Which of these four gene parts should allow the construction of the most accurate phylogenetic tree, assuming that this is the only part of the gene that has acted as a reliable molecular clock?
A) Intron I B) Exon I C) Intron VI D) Exon V