Respiration and Circulation — BIOLOGY STD 12 Science — Question

Classify the given plant growth regulators as per their specific control of event in plant life cycle in Column A and complete Column B.
(IAA, GA, Cytokinin, Abscissic acid)

Column A	Column B
(1) Shedding of leaves	————
(2) Induce flowering in LDP	————
(3) Apical dominance	————
(4) Induce RNA synthesis	————

Write types of neuroglial cells of CNS and PNS in tabular form.

Classify the given plant hormones as their specific effect observed in plants in Column A and complete Column B.
(ABA, GA, Ethylene, Kinetin)

Column A	Column B
(1) Bolting of rosette plants	————
(2) Epinasty	————
(3) Closure of stomata	————
(4) Proliferation of callus	————

Classify the following:
i. Hairy leaves in wheat
ii. Nectar-less cotton having smooth leaves
iii. Hairy leaves in cotton
iv. Solid stem in wheat

Resistance to insects	Morphological characters
Jassids	————
Cereal leaf beetle	————
Stem borers	————–
Bollworms	—————

Origin of conifers, Abundance of trilobites, Diversification of fishes, All types of marine algae, Formation of forests, Rise of dinosaurs, Extinction

Geological time period	Major events
Cambrian	————
Devonian	————
Permian	————
Triassic	————

Genetic Disorders
[Turner’s syndrome, Sickle-cell anaemia, Thalassemia, Edward’s syndrome, Klinefelter’s syndrome, Down’s syndrome]

Column A	Column B
(A) Autosomal disorder	—————–
(B) Sex chromosomal disorder	—————–
(C) Mendelian disorder	—————–