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TLS Online TPP Program

#Question id: 7115

The ability of the sea urchin embryo to regulate its development illustrates the fact that there are maternally-determined differences along the animal-vegetal axis that are necessary for normal development. Which of the following statements about regulation in sea urchin embryos is consistent with that fact?

#Unit 5. Developmental Biology
  1. Up until the hatching of the embryo as a pluteus larva, any blastomere can be separated from the others and will regulate to go on and develop into a fully formed and full-sized larva.
  2. Up until the hatching of the embryo as a pluteus larva, any blastomere can be separated from the others and will regulate to go on and develop into a fully formed, yet smaller, larva.
  3. Blastomeres from the animal or vegetal poles of the embryo can be isolated and will go on to form an embryo, as long as either an animal or vegetal pole is included.
  4. Blastomeres at the 4-cell stage each still possesses a portion of the original animal-vegetal axis, and if isolated will go on to form a fully formed, yet smaller, larva.
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TLS Online TPP Program

#Question id: 26491

#Unit 3. Fundamental Processes

Choose which of the following are responsible for the dephosphorylation of Ser2 & Ser5 respectively
TLS Online TPP Program

#Question id: 2294

#Unit 2. Cellular Organization

________ use such high magnification that even atoms are discernable.
TLS Online TPP Program

#Question id: 2039

#Unit 4. Cell Communication and Cell Signaling

MBL has a function in the lectin pathway analogous to that of IgM in the classical pathway, and MASP-1 and MASP-2 take on functions analogous of
TLS Online TPP Program

#Question id: 12269

#Unit 7. System Physiology – Animal

If a woman hears her baby cry, she may experience milk ejection from the nipples even before the baby is placed to the breast. What is the explanation for this?
TLS Online TPP Program

#Question id: 18378

#Unit 12. Applied Biology

Biostimulation is a process which involves the modification of the environment to