The nictitating membrane in a rabbit is $.....$.

Johnston's organ,present in mosquitoes,is used to detect vibrations. Where are they located?

Which of the following statement$(s)$ is/are correct about muscle tissue?

Which of the following is a calcium-free bone?

Identify the correct terms for the following analogy-based questions:
$(i)$ In cockroach,blood is : $Hemolymph$ :: In frog : ..........
$(ii)$ Before nymphal stage : $Wing$ $pad$ :: In adult cockroach : ...
$(iii)$ In earthworm : Tactile receptors :: In cockroach,dorsal side of the head : .....

The Haversian system is a characteristic feature of which of the following?