What best describes the tunic of a tunicate?
A. It is made of chitin, like the shell of a crab.
B. It is made of calcium carbonate, like the shell of a clam.
C. It is made of keratin, like human hair.
D. It is made of cellulose, like the cell wall of a plant.
D. It is made of cellulose, like the cell wall of a plant.
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The colinearity rule describes rev
A. the correlation between the spatial arrangement of homeotic genes along the chromosome with their expression. B. The correlation between the timing and location of expression of homeotic genes. C. the long stretches of DNA between homeotic gene complexes. D. the parallel arrangement of homeotic genes between different chromosomes. E. the spatial arrangement of alpha helices in proteins encoded by homeotic genes.
The two amino acids depicted above both have side groups (R groups) that are
a. acidic and polar. b. uncharged and nonpolar. c. basic and polar. d. positively and negatively charged and nonpolar. e. uncharged and polar.
The two brain hemispheres are connected via what structure?
a. thalamus b. basal ganglia c. corpus callosum d. amygdala
Describe the functions of the three types of bone cells
What will be an ideal response?