Based on embryo studies, blood proteins, and biochemistry of muscle activity, chordates may be
more closely linked to echinoderms than other phyla. Indicate whether the statement is true or false.
T
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Hydrocyanic acid, HCN, is a weak acid. Which of the following is the correct expression for the Ka of hydrocyanic acid?
A) [H3O+][HCN]/[CN-] B) [H3O+][CN-]/[HCN] C) [HCN]/[ H3O+][CN-] D) [HCN][CN-]/[ H3O+]
What are the stinging cells present in cnidarians?
A) Cnidoblasts B) Spicules C) Nettles D) Gastrodermis
The four major NRCS soil orders which are classified on the basis of soil forming factors unrelated to climate, such as slope, drainage, or maturity are:
a. Oxisols, Mollisols, Ultisols, and Vertisols. b. Entisols, Histosols, Inceptisols, and Andisols. c. Alfisols, Spodosols, Oxisols, and Histosols. d. Vertisols, Ultisols, Spodosols, and Mollisols.
In what ways are the Sierra Nevada Mountains and the Andes Mountains the same in terms of mountain formation?
A) Crumpling of the continent through collision with another continent B) Emplacement of batholiths C) Extension of the continent through rifting D) Downwarping of the continent due to crustal subsidence