#Question id: 12262
#Unit 10. Ecological Principles
#Question id: 11024
#Unit 7. System Physiology – Animal
A 55-year-old man has been diagnosed with Stokes-Adams syndrome. Two minutes after the syndrome starts to cause active blockade of the cardiac impulse, which of the following is the pacemaker of the heart?
#Question id: 7236
#Unit 5. Developmental Biology
Which of the following statement justified that the PMZ in chick is
functionally equivalent to the amphibian Nieuwkoop center?
A.
The posterior marginal zone produces Wnt8c and that, the PMZ cells secrete Vg1,
a member of the TGF-β family.
B.
PMZ cells capable of inducing the accumulation of β-catenin
C.
PMZ cells secretes BMP, a member of the TGF-β family.
D.
PMZ secretes its own Nodal antagonist—the Lefty protein.
Which of the following combination is correct?
#Question id: 13214
#Unit 6. System Physiology – Plant
#Question id: 3663
#Unit 3. Fundamental Processes
_______________ is a specific RNase which cuts RNA–DNA hybrids; involved in replication of ColE1-like plasmids.