Which of the following are products of nonstructural genes, and are therefore never translated?
A. transfer RNA
B. ribosomal RNA
C. messenger RNA
D. transfer RNA and ribosomal RNA
E. ribosomal RNA and messenger RNA
D. transfer RNA and ribosomal RNA
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The echinoderms are most closely related to the ________.
A. mollusks B. arthropods C. flatworms D. chordates
Four __________ glands make a hormone that acts on bone and kidney cells and raises blood calcium level. Fill in the blank(s) with the appropriate word(s)
The arrival of an action potential at a synaptic terminal causes voltage-gated potassium channels to open
____________________ Indicate whether the statement is true or false.
Categorization of algae is challenging. In the hybrid system of algal classification, what are the categories of algae based on?
A) The type of photosynthetic pigments present, the chemical makeup of the cell wall, cellular morphology, the form in which food is stored B) The type of photosynthetic pigments present, genetic analysis of the DNA, cellular morphology, the form in which food is stored C) The type of photosynthetic pigments present, the chemical makeup of the cell wall, cellular morphology, the number of flagella D) The type of photosynthetic pigments present, the chemical makeup of the cell wall, the physical habitat of the algae, the form in which food is stored