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TLS Online TPP Program

#Question id: 9151

What would be the effect on climate in the temperate latitudes if Earth were to slow its rate of rotation from a 24-hour period of rotation to a 48-hour period of rotation?

#Unit 9. Diversity of Life Forms

  1. Seasons would be longer and more distinct (colder winters and warmer summers).

  2. Large-scale weather events such as tornadoes and hurricanes would no longer be a part of regional climates.

  3. Winter seasons in both the northern and southern hemispheres would have more abundant and frequent precipitation events.

  4. There often would be a larger range between daytime high and nighttime low temperatures.

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TLS Online TPP Program

#Question id: 1583

#Unit 4. Cell Communication and Cell Signaling

These cells are involved in cell-mediated immunity and destroy virally infected cells:
TLS Online TPP Program

#Question id: 1584

#Unit 4. Cell Communication and Cell Signaling

Which cell type interacts with both the humoral and cell-mediated immune pathways?
TLS Online TPP Program

#Question id: 16957

#Unit 4. Cell Communication and Cell Signaling

the immune system can be summarized as follows. Which is not correct for immune system?
TLS Online TPP Program

#Question id: 16956

#Unit 4. Cell Communication and Cell Signaling

Polyclonal antibodies are raised against bovine serum albumin in rabbit. Subsequently IgG in the antiserum is purified and digested with either pepsin or papain. Out of the following possibilities, which one is correct?
TLS Online TPP Program

#Question id: 16955

#Unit 4. Cell Communication and Cell Signaling

Stage thymocytes express neither CD4 nor CD8, markers associated with mature T cells. They are therefore called double negative (DN) cells. DN cells first travel to the region under the thymic capsule, a region referred to as the ________, where they proliferate and begin to generate their T-cell receptors. Thymocytes that successfully express TCRs begin to express both CD4 and CD8, becoming double positive (DP) cells, and populate the cortex, the site where most (85% or more) immature T cells are found.
TLS Online TPP Program

#Question id: 16954

#Unit 4. Cell Communication and Cell Signaling

match the following

 

 

A. endosteal niche

1. versatile cells that both generate bone and control the differentiation of HSCs

B. osteoblasts

2. line the blood vessels and also regulate HSC differentiation

C. reticular cells

3. 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.