The human body possesses four types of tissues, namely muscle, epithelial, connective and nervous. Connective tissue is further divided into six types, blood, lymph, bone, cartilage, adipose tissue, tendons and ligaments.

Lenticels are present in dicot stem and dicot root.

The functions of parenchyma tissues are storage, photosynthesis, and to help the plant float on water. Collenchyma- Are similar to parenchyma cells with thicker cell walls. They are meant to provide mechanical support to the plant structure in parts such as petiole of the leaf.

Sclereids are a reduced form of sclerenchyma cells with highly thickened, lignified cellular walls that form small bundles of durable layers of tissue in most plants. The presence of numerous sclereids form the cores of apples and produce the gritty texture of guavas.

Bryophyte and pteridophyte have motile male gamete and gymnosperm and angiosperm have non-motile gamets.

Annelida and arthropoda share dissimilarities on the mode of fertilisation, circulatory system and organ system.

Sensory tentacle located on anterior head region.

Ophiura or the serpent star is a species of the brittle star in the order Ophiurida belonging to the phylum Echinodermata and class Ophiuroidea.

Cucumaria is a genus of sea cucumbers belonging to the phylum Echinodermata and class Holothuroidea.

The body of amphibians is divisible into head and trunk.

Echinodermata and Aschehelminthes are mostly dioceious.