Diplotene phase of meiosis is also charactertised by
a. Desynapsis
b.Complete terminalisation of chiasmata
c.Dictyotene stage
d. Complete disappearance of nuclear membrane and nucleoli
e. Complete development of astral rays and aster
f. Longest phase of prophase-I

Pick up the correct statement : (a) Synapsis of homologous chromosomes occurs during prophase I (b) Division of centromeres takes place during anaphase I (c) Spindle fibres disappear completely in telophase of mitosis (d) Nucleoli mey reappear in telophase I

Pick up the correct statement : (a) Synapsis of homologous chromosomes occurs during prophase I (b) Division of centromeres takes place during anaphase I (c) Spindle fibres disappear completely in telophase of mitosis (d) Nucleoli may reappear in telophase I

Pick up the correct statement : (a) Synapsis of homologous chromosomes occurs during prophase I (b) Division of centromeres takes place during anaphase I (c) Spindle fibres disappear completely in telophase of mitosis (d) Nucleoli may reappear in telophase I

In the adjacent diagram, AO is a ray of light incident on a rectangular glass slab. (a) Complete the path of the ray till it emerges out of the slab. (b) In the diagram, mark the angle of incidence (i) and the angle of refraction (r) at the first interface. how is the refractive index of glass related to the angles i and r ? (c) Mark angle of emergence by the letter e. how are the angles i and e related ? (d) Which two rays are parallel to each other ? Name them (e) Indicate in the diagram the lateral displacement between the emergent ray and the incident ray. state one factor that affects the lateral displacement.