An Initial Cell in a Plant Apical Meristem Has a Cuboidal

question 67

Multiple Choice

An initial cell in a plant apical meristem has a cuboidal shape. Predict the orientation of microtubules beneath the cell membrane if that cell will differentiate into procambium and ultimately a xylem vessel.

• A) Microtubules are arranged randomly around the cell.
• B) Parallel microtubules are oriented in the direction the cell will eventually expand.
• C) Rings of microtubules are oriented in the plane the cell will eventually expand.
• D) Rings of microtubules are oriented at right angles to the direction the cell will eventually expand.

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Definitions:

Chemical Transmitters

Molecules released by neurons to transmit signals across synapses to other neurons, muscles, or glands.

Chemical Synapse

Junction at which messenger molecules are released when stimulated by an action potential.

Axosynaptic Synapses

Junctions where the axon terminal of one neuron communicates with the synapse of another neuron by releasing neurotransmitters.