The photo shows the microscopic appearance of maple wood. Using your knowledge of the woody stem section, identify cell type a and the “line” of cells at b. (Note: The outside of the tree from which this section was taken is shown in the photo that accompanies question 8.)
What will be an ideal response?
(a) Xylem ray (b) pith.
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The sugar in DNA is comprised of ____ carbons
a. three b. four c. five d. six e. seven
Four of the five answers listed below are true of a neuron at resting potential. Select the exception
a. The interior of a neuron is positive. b. The interior of a neuron has a negative charge. c. There are more sodium ions outside a neuron. d. There are more potassium ions inside a neuron. e. The membrane of a neuron is polarized.
Examples of "new" features, which include wings on insects, flowers on plants, and feathers on birds,
are referred to as: a. preadaptations. b. allometric growth. c. allopolyploidy. d. paedomorphosis. e. punctuated equilibrium.
Draw a diagram of a typical neuron, label its parts, and list the function of each labeled structure. What will be an ideal response?