Filtration requires ___ for movements through membranes.
Fill in the blank(s) with the appropriate word(s).
hydrostatic pressure
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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
Excess energy is stored in ___ mainly in ___
a. chemical bonds---adipose tissue b. chemical bonds---carbohydrates c. carbon atoms---adipose tissue d. carbon atoms---carbohydrates e. hydrogen bonds---water
Which of the following statements regarding HIV is incorrect?
A. PCR is the primary technique for detecting HIV in blood. B. The virus can enter into nervous tissues and cause abnormalities. C. The virus attaches to host cells with CD4 receptors. D. The viral DNA integrates into the host DNA. E. The virus becomes latent in host cells.
________ is the process through which endospores are formed within a vegetative cell.
Fill in the blank(s) with the appropriate word(s).