Which cutaneous receptors are sensitive to pressure?
A. Pacinian corpuscles and Ruffini endings
B. Krause end bulbs and Merkel disks
C. Root hair plexus and Krause end bulbs
D. Pacinian corpuscles and Meissner corpuscles
E. Ruffini endings and Merkel disks
Answer: A
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Stabilizing selection reduces genetic and phenotypic variation and increases the frequency of intermediate phenotypes
a. True b. False
If speciation occurs with the production of two or more species in a small area, ____ is (are) probably
responsible.
a. both sympatric and parapatric speciation b. either sympatric or parapatric speciation c. neither sympatric or parapatric speciation d. only sympatric speciation e. only parapatric speciation
Complex traits are usually quantified by ____________________ rather than by ____________________.Fill in the blank(s) with the appropriate word(s)
Given the structure below, please answer the following questions
Is the accompanying figure DNA or RNA? ________ Is the arrow closest to the 5' or 3' end? ________ Spleen diesterase is an enzyme that breaks the covalent bond that connects the phosphate to the 5' carbon. Assume that the dinucleotide is digested with spleen diesterase. To which base and to which carbon on the sugar is the phosphate now attached, A or T? A) DNA; 3' end; T, 5' B) DNA; 5' end; A, 5' C) RNA; 3' end; A, 3' D) RNA; 3' end; T, 3' E) DNA; 3' end; A, 3'