In angiosperms, where does pollen production take place?
a. megasporangium
b. antipodal cells
c. microsporangium
d. synergid cells
c. microsporangium
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When the blood becomes ________, it can lead to a depression in the activity of the central nervous system.
A) hypoxic B) alkaline C) hypocapnic D) acidic E) pH 7.4
In an HIV-infected cell producing HIV virus particles, the viral glycoprotein is expressed on the plasma membrane. How do the viral glycoproteins get to the plasma membrane? They are synthesized _____
A) on ribosomes on the plasma membrane B) by ribosomes in the rough ER and arrive at the plasma membrane in the membrane of secretory vesicles C) on free cytoplasmic ribosomes and then inserted into the plasma membrane D) by ribosomes in the rough ER, secreted from the cell, and inserted into the plasma membrane from the outside
Which of the following describes what is currently known about Ctenophore symmetry?
A. Ctenophores are lacking symmetry. B. Ctenophores are possibly triploblasts because of muscle cells derived from mesoderm. C. Ctenophores are diploblasts with bilateral symmetry. D. Ctenophores are bilaterians.
Immune therapy research with potential to work in alleviating both organ rejection and autoimmune disease involves:
A) antibodies. B) regulatory T cells. C) cytotoxic T cell action. D) vaccines.