Label the diagram using the following terms: bark; heartwood; sapwood; secondary phloem; vascular cambium.

What will be an ideal response?


(left to right:) Bark, secondary phloem, heartwood, sapwood. (Bottom left:) vascular cambium.

Biology & Microbiology

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Rapid inward diffusion of Na+ produces a dramatic change in membrane potential. What is this event called?  

A.  hyperpolarization B.  excitatory postsynaptic potential C.  saltatory conduction D.  monosynaptic reflex E.  depolarization

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What is the best definition for the FISH technique?

A) A method to fluorescently label different genes on metaphase chromosomes. B) A method to fluorescently label methylated histones associated with chromosomes. C) A method to fluorescently label heterochromatin. D) A method to fluorescently label euchromatin.

Biology & Microbiology

The movement of organic compounds throughout plants is described as ____

a. cohesion-tension b. source-to-sink c. facilitated transport d. active transport e. transpiration pull

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Which soil type is the most poorly drained?

a. gravel b. sand c. clay d. humus e. silt

Biology & Microbiology