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TLS Online TPP Program

#Question id: 11983

Which of the following is a behavioral pattern resulting from an ultimate cause?

#Unit 10. Ecological Principles
  1. A male robin attacks a red tennis ball because it resembles the breast of another male.
  2. A male robin attacks a red tennis ball because hormonal changes in spring increase its aggression.
  3. A male robin attacks a red tennis ball because a part of its brain is stimulated by red objects.
  4. A male robin attacks a red tennis ball because it confuses it with an encroaching male who will steal his territory.
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TLS Online TPP Program

#Question id: 16954

#Unit 4. Cell Communication and Cell Signaling

match the following

ComponentDescription
A. endosteal niche1. versatile cells that both generate bone and control the differentiation of HSCs
B. osteoblasts2. line the blood vessels and also regulate HSC differentiation
C. reticular cells3. send processes connecting cells to bone and blood vessels, and unexpectedly 
D. sympathetic neurons
4. can control the release of hematopoietic cells from the bone marrow.
TLS Online TPP Program

#Question id: 16953

#Unit 4. Cell Communication and Cell Signaling

The ability of any stem cell to self-renew and differentiate depends on the structural organization and cellular function of specialized anatomic microenvironments known as stem cell niches. These sequestered regions are typically populated by a supportive network of stromal cells. Stem cell niche stromal cells express soluble and membrane-bound proteins that regulate cell survival, proliferation, differentiation, and trafficking. Which statements is true about HSCs?
TLS Online TPP Program

#Question id: 16148

#Unit 4. Cell Communication and Cell Signaling

 Which statement is not true for NKT Cells?
TLS Online TPP Program

#Question id: 16147

#Unit 4. Cell Communication and Cell Signaling

 Which statement is not true for Natural killer (NK) cells?
TLS Online TPP Program

#Question id: 16146

#Unit 4. Cell Communication and Cell Signaling

If a given lymphocyte divides to form two daughter cells, both daughters bear antigen receptors with antigen specificities identical to each other and to the parental cell from which they arose, and so will any descendants they produce. The resulting population of lymphocytes, all arising from the same founding lymphocyte, is a clone. Which interleukin is responsible for clone production?
TLS Online TPP Program

#Question id: 16145

#Unit 4. Cell Communication and Cell Signaling

 Which line is not true for follicular dendritic cells?