Mycoplasma is a

$\begin{array}{|l|l|} \hline Column\;-\;I & Column\;-\;II \\ \hline A.\;Caecum\;in\;earthworm & 1.\;Tubular \\ \hline B.\;Caecum\;in\;cockroach & 2.\;Forgut \\ \hline C.\;Gizzard\;in\;earthworm & 3.\;26^{th}\;segment \\ \hline D.\;Gizzard\;in\;cockroach & 4.\;8-9\;segment \\ \hline \end{array}$

→

A dental disease characterised by moltting of teeth is due to the presence of a certain chemical element in drinking water. Which of the following is that element?

→

Which one of the following events is incorrect for cell cycle?

→

In mosses the second gametophytic stage is leafy stage. Consider the following statements about leafy stage

$I.$ Leafy stage is produced from the secondary protonema as a lateral bud

$II.$ They consist of upright, slender axes bearing spirally arranged leaves

$III.$ They are attached to the soil through multicellular rhizoids

$IV.$ This leafy stage bears the sex organ

Which of the statements given above are correct?

→