[" Auxin can be bioassayed by "],[" (a) Avena coleoptile curvature "],[" (b) hydroponics "],[" (c) potometer "],[" (d) lettuce hypocoty elongation "]

The presence of auxins in a solution could be tested by (a) Avena sativa stem tip test (b) Carbon tetrachloride test (c) Iodine test (d) Defoliation test

B, C and D can be distinguished with

Bolting in rosette plants can be induced by (a) auxins (b) gibberellins (c) cytokinins (d) ethylene

Seedless fruits can be obtained by spraying (a) gibberellins (b) Auxins (c) cytokinins (d) ethylene

Mark odd one w.r.t, maize. (a) Triploid aleurone layer (b) Presence of coleoptile (c) Membranous seed coat free from pericarp (d) Presence of scutellum

In the embryos of a typical dicot and a grass, true homologous structures are (A) Coleorhiza and coleoptile (B) Coleoptile and scutellum (C) Cotyledons and scutellum (D) Hypocotyl and radicle

Which of the following is a gaseous hormone ? (a) ethylene (b) cytokinin (c) both ethylene and auxin (d) gibberellin

Define (a) centre of curvature (b) radius of curvature ( c) pole (d) peincipal axis, and ( e) aperture, of a spherical mirror with the help of a blabelled diagram.