Calciferous gland is present in intestine of earthworm to neutralize the humic acid present in humus. B, C, D, H, J, L

In earthworm, after 26 th segment there is presence of internal median fold of ventral wall called typhlosole that increase effective area of absorption. A, B, F, G, I, M

Blood glands in earthworm are present in 4 th , 5 th , & 6 th segments. B, D, E, K, L, N

The excretory organs present in earthworm is called nephridia. (E) Integumentary nephridia forms forests of nephridia in clitellar region. (F) There is 1 pair of heart in earthworm. (G) There are 2 pair of testis in earthworm which are present in 11 th & 12 th segments. (H) Spermathecae receive and store spermatozoa during copulation in female earthworm. (I) Fertilization in earthworm occur within the cocoon and development is indirect. (J) On an average, each cocoon produces 4 baby earthworm. (K) The scientific name of common cockroach is Periplaneta Americana. (L) In each segment of cockroach, exoskeleton has hardened plates called sclerites. (M) Ventrally, sclerite is called tergites and dorsally it is called sternites and are joined to each other by arthrodial membrane. (N) The mouth part of cockroach is biting and chewing type. (O) The first pair of wings arises from mesothorax and second pair from metathorax in cockroach. A, C, F, I, K, O