The ABC genes in the model of Arabidopsis flower development are organ-identity genes that arealso:a
segmentation genes.
b. homeotic genes.
c. gap genes.
d. translation factors genes.
e. growth factor genes
B
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The root apical meristem is covered by a _________ that protects the meristem as it grows through the soil
A. root hair B. root cap C. root cortex D. root endodermis E. root pericycle
The sporophyte generation of a plant is and produces spores.
A. multicellular; diploid B. diploid; haploid C. haploid; diploid D. triploid; haploid E. triploid; diploid
How are the two chromosomes separated and distributed to the two ends of the cell during prokaryotic cell division?
a. by an unknown mechanism b. by attachment to separating membrane regions c. by attachment to actin d. by the action of the mitotic spindle
Synthesis of a repressible enzyme is stopped by the
A) allosteric transition. B) substrate binding to the repressor. C) corepressor binding to the operator. D) corepressor-repressor complex binding to the operator. E) end product binding to the promoter.