CSIR NET 2022 | Life Science : (Ecological Principles) | (21 January)

Which of the following best describes a morphogen?

C . elegans is a powerful developmental model because:

What would happen as a result of a transplantation experiment in a chick embryo in which cells determined to become a forelimb were replaced by some cells determined to become a hindlimb?

Which of the following are correct about morphogenetic movements?

A) movement of an individual cell with respect to other cells in the embryo is termed migration

B) movement of a cell from the surface of an embryo into its interior is termed ingression

C) movement of a cell from the interior of an embryo to the external surface is termed egression

D) spreading of a sheet of cells is termed involution

In elauata (elu) mutant of Arabidopsis, shoot apical meristem (SAM) size as well as expression of wuschel (wus) are increased whereas SAM size is reduced in wus mutant plants. With this information, choose the correct statement which best describes the function of wus and elu genes