In mammals,the scent-producing glands are known as:

How many of the given statements are true?
$A.$ The dry surface of the skin and the moist surface of the buccal cavity are lined by compound epithelium.
$B.$ Cuboidal epithelium facilitates diffusion across the epithelium.
$C.$ Intercalated discs are the cell junctions between the cardiac muscle cells.
$D.$ Skeletal muscle fibers can be located in the biceps muscle.
$E.$ In a bone,osteocytes are located in lacunae.

In mammals,Haversian canals are connected with each other by transverse canals,which are called:

Identify the correctly matched pairs of the germ layers and their derivatives.
$I.$ Ectoderm - Epidermis
$II.$ Endoderm - Dermis
$III.$ Mesoderm - Muscles
$IV.$ Mesoderm - Notochord
$V.$ Endoderm - Enamel of teeth

Match Column $X$ with Column $Y$ and select the correct option:

Column $X$	Column $Y$
$(1)$ Pheretima posthuma	$(P)$ Sunflower
$(2)$ Helianthus annuus	$(Q)$ Modern human
$(3)$ Rana tigrina	$(R)$ Earthworm
$(4)$ Homo sapiens sapiens	$(S)$ Frog

Which one of the following groups of structures/organs have similar functions?