Which cells in a root form a protective barrier to the vascular system where all materials must move through the symplast?
A) pericycle
B) cortex
C) epidermis
D) endodermis
E) exodermis
Answer: D
You might also like to view...
Epigentic mechanisms of gene regulation ____ and are ____
A. can be inherited by daughter cells; permanent B. can be inherited by daughter cells; often reversible and responsive to environmental change C. can be inherited by daughter cells; random with respect to the environment D. are not inherited by daughter cells; reversible and responsive to environmental change E. are not inherited by daughter cells; permanent
How did the cessation of crossing-over contribute to the disparity between the X and Y chromosomes? What will be an ideal response?
Which term refers to the selectively permeable barrier that is present in the innermost layer of the root cortex?
a. pericycle b. root hairs c. endodermis d. quiescent centre
Which sequence of events is required for the brain to interpret sound?I.Vibration of the basilar membrane relative to the tectorial membrane causes cilia on hair cells to bend and triggers depolarization.II.Hair cells stimulate the production of action potentials in sensory neurons that project to the brain.III.Ganglion cell axons transmit action potentials to the occipital lobe.
A. II then I B. III then I then II C. I then II D. III then I E. I then II then III