STD 11 - 2. Biology classification — BIOLOGY STD 11 Science — Question

Pyruvic acid

$+ Co - A + NA D^{* i M g^{2+1} A+B+N D H}+H^{+i-2}$

$I.$ devoid of nucleus

$II.$ formed in bone marrow

$III.$ possess healing properties

$IV.$ biconcave in shape

$V.$ help in blood clotting

Choose the option with correct properties

$(i)$ The body of the cockroach is segmented and divisible into three distinct regions - head, thorax and abdomen.

$(ii)$ Blood vascular system is of closed type.

$(iii)$ They are monoecious and both seves have well developed reproductive organs.

$(iv)$ The development of P. americana is paurometabolus, meaning there is development through nymphal stage.

$R -$ In $C_3$ plants $CO_2$ occurs in mesophyll cells and bundle sheath cells.