Olfactory receptors are located in which one of the following?
A) taste buds
B) muscles
C) upper part of nasal passages
D) skin surrounding nasal openings
E) upper regions of mouth
C
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Which of the following is not a characteristic of salps?
a. Free-swimming lifestyle b. Incurrent and excurrent siphons c. Radial symmetry d. Bioluminescence e. Filter-feeding
What are guard cells and how are they able to control the opening and closing of stomata. What will be an ideal response?
During the elongation step of translation, ____
a. the small ribosomal subunit pairs with an anticodon b. amino acids are added to a growing polypeptide chain c. methionine is inserted at the beginning of all proteins d. mRNA is transformed into tRNA e. release factors bind to stop codons
What cell type secretes antibodies?
A) natural killer cells B) helper T cells C) macrophages D) mast cells E) plasma cells