While the amount of DNA doubles during the S phase, the number of chromosomes remains the same. In which subsequent phase does the actual separation of sister chromatids occur, effectively doubling the chromosome count temporarily?

#Question id: 5050

#Zoology

A stem cell capable of producing all the cell types of a lineage(embryonic and extraembryonic) is said to be-

#Question id: 5051

#Zoology

after the 8-cell stage, the mammalian embryo develops an outer layer (which becomes the fetal portion of the placenta), and an inner cell mass that generates all the cells of embryo. The cells of the inner cell mass are thus said to be-

#Question id: 5052

#Zoology

cell populations within each germ layer expand and differentiate, resident stem cells are maintained within these developing tissues and function to generate cell types with restricted specificity for the tissue in which they reside. these stem cells are-

#Question id: 5053

#Zoology

Local cell signaling is carried out via membrane receptors that bind to proteins in the extracellular matrix (ECM) or directly to receptors from a neighboring cell in a process called as-

#Question id: 5054

#Zoology

when one group of cells changing the behavior of an adjacent set of cells, thereby causing them to change their shape, mitotic rate, or cell fate. This kind of interaction at close range between two or more cells or tissues of different histories and properties is called as-

#Question id: 5055

#Zoology

There are at least two components to every inductive interaction-