Match the following stem cell type (Column I) with their niche location (Column II).

Column I	Column II
A. Intestine	i. Bone marrow
B. Hematopoietic stem cells	ii. Bulge
C. Hair follicle	iii. Testes
D. Sperm	iv. Base of small intestinal crypts

Which of the following is correct?

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#Question id: 5016

#Unit 11. Evolution and Behavior

Approximately how far back in time does the fossil record extend?

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#Question id: 28173

#Unit 5. Developmental Biology

If a specified cell is transplanted to a population of differently specified cells, the fate of the transplant will be altered by its interactions with its new neighbors, that means it undergoes to___

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#Question id: 27923

#Unit 11. Evolution and Behavior

There is some given main postulates of darwinism, except?

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#Question id: 4516

#Unit 3. Fundamental Processes

High mobility group (HMG) proteins

A. are a common type of architectural regulator

B. facilitating the looping of the DNA

C. the binding is relatively very specific

D. are abundant in chromatin and bind to DNA with limited specificity.

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#Question id: 22973

#Unit 7. System Physiology – Animal

Which enzyme converts 25-hydroxycholecalciferol to the active form, 1,25-dihydroxycholecalciferol.