Classic experiments suggested that a floral stimulus, florigen, could move across a graft from an induced plant to a noninduced plant and trigger flowering. Recent evidence using Arabidopsis has recently shown that florigen is probably
A) a phytochrome molecule that is activated by red light.
B) a protein that is synthesized in leaves, travels to the shoot apical meristems, and initiates flowering.
C) a membrane signal that travels through the symplast from leaves to buds.
D) a second messenger that induces Ca++ ions to change membrane potential.
E) a transcription factor that controls the activation of florigen-specific genes.
Death's-head Hawkmoth (Acherontia lachesis), an old bleached specimen still showing the classic
The traits Mendel used in his experiments, and the results of the F1 and F2 generation crosses.
CRISPR-Cas9 System for In Vivo Genome Editing Experiments
(a) Initial mtDNA results suggested modern humans and Neadertals were equally distantly related to D
The forces of diffusion and electrostatic pressure. (a) In diffusion, solutes move from an area of h
Floral homeotic mutations in Arabidopsis