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#Question id: 7154

Cancer is believed to often arise from stem cells, rather than fully differentiated cells. Which of the following are consistent with this view?

#Unit 5. Developmental Biology

Stem cells are actively dividing and express few differentiated functions, so they may have fewer changes to undergo than do fully differentiated cells in becoming cancer cells.
DNA replication is necessary for mutations to occur, and stem cells are replicating their DNA whereas differentiated cells are for the most part not replicating their DNA.
Teratocarcinomas are tumors that arise from germ cells or embryonic stem (ES) cells, under certain circumstances, demonstrating that tumors can arise from stem cells without further mutation.
All of the above are reasons that cancer cells may more readily arise from stem cells than from fully differentiated cells.

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#Question id: 28451

#Unit 5. Developmental Biology

Which of the following cell divide to form the central vulval cells?

TLS Online TPP Program

#Question id: 28452

#Unit 5. Developmental Biology

Which of the following cell divide to form the lateral vulval cells?

TLS Online TPP Program

#Question id: 28453

#Unit 5. Developmental Biology

The cells which donot receive any signals from the anchor cell because these cell farther away from anchor cells that involve to generate which type of cell by default ?

TLS Online TPP Program

#Question id: 28454

#Unit 5. Developmental Biology

A researcher performed an experiment during vulva formation in C.elegans;

I- In first experiment destroyed anchor cell

II- In second experiment destroyed three central VPCs

What kind of conclusion has been drawn by these experiments?

a) I-Three cells out of six of the equivalence group divide once and contribute to the vulva formation

b) I-all six cells of the equivalence group divide once and contribute to the hypodermal tissue

c) II-three outer cells, which normally form hypodermis, generate vulval cells instead

d) II-three remaining cells normally formed hypodermis as usually

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