A planarian can grow back its head because it has lots of undifferentiated stem cells all throughout its bodyGroup of answer choicesTrueFalse PreviousNext

Planaria are interesting to study regarding stem cells for all of the following reasons EXCEPT:Group of answer choicesThey have a large number of stem cellsThey regenerate relatively quicklyThey can differentiate their cells into all the various body systems they haveThey are able to do sexual reproduction

A cell that no longer has any developmental flexibility is said to beGroup of answer choicesepigenetictotipotentdementeddifferentiatedpluripotent

They lack secondary growthSelect an answerAall dicotsBangiospermsCall monocotsDboth (A) & (B)

What is a stem cell?An embryo cellAn undifferentiated cellA differentiated cellAn adult cell

What is a stem cell?An embryo cellAn undifferentiated cellA differentiated cellAn adult cell2Which of the following is a good source of adult stem cells in humans?Bone marrowMuscle cellsBlood cellsNerve cells3Which of the following is an advantage of embryonic stem cells compared with adult stem cells?There are potential ethical issuesThey are totipotentThey are multipotentThey could be rejected when transplanted into an adult4Unspecialised stem cells in plants are grouped together in structures called:MeristemsLeavesStemsShoots5Which of the following statements about plants is not true?Stem cells from plants can be used to produce new plant cells quickly and economicallyThere are no ethical issues with the use of plant stem cellsExposed meristem cells dipped in auxin powder and planted will produce rootsPlants stop growing when they reach adulthood