Helical and icosahedral are terms used to describe the shapes of a virus
A. envelope.
B. spike.
C. core.
D. capsid.
E. capsomere.
Answer: D
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The MONOPTEROUS gene in Arabidopsis encodes a protein that is similar in its function to which animal protein?
A) MyoD in frog embryos B) Bicoid in fruit-fly embryos C) keratin in human embryos
Membranes contain several classes of lipids, such as phospholipids, sphingolipids, sterols, etc. In spite of their many differences, they all
A) are soluble in nonpolar solvents. B) can be easily hydrolyzed. C) are readily soluble in water at 37C. D) can be reduced by strong reducing agents such as sodium. E) easily react with bases but not with acids.
Freshwater flatworms have this type of system for osmoregulation.
A. protonephridial B. metanephridial C. osmonephridial D. eunephridial E. isonephridial
Prokaryotic binary fission includes what two main features?
What will be an ideal response?