Ectoderm forms: Eye (conjunctiva, cornea, lens, retina, iris, ciliary muscles) Mesoderm forms: Sclera & choroid of eye.

Correct Option: A

Ectoderm forms: Eye (conjunctiva, cornea, lens, retina, iris, ciliary muscles) Mesoderm forms: Sclera & choroid of eye.

At the junction of the sclera and the cornea, the vascular coat sharply blends into the cavity of the eyeball to form a thin, coloured partition. This partition is called iris.

Correct Option: D

At the junction of the sclera and the cornea, the vascular coat sharply blends into the cavity of the eyeball to form a thin, coloured partition. This partition is called iris.

Iris controls the size of pupil by contracting or relaxing of its circular muscles. It controls the amount of light entering in eye.

Correct Option: D

Iris controls the size of pupil by contracting or relaxing of its circular muscles. It controls the amount of light entering in eye.

Melanin is the pigment which gives colour to the skin. Retinol is the other name for vitamin A. Sclerotin is the component of the carapace in crustaceans.

Correct Option: C

Melanin is the pigment which gives colour to the skin. Retinol is the other name for vitamin A. Sclerotin is the component of the carapace in crustaceans.

The diagramnatic cross section of a single loop of human cochlea represents the three different partsA- Perilymph B- Tertorial membrane C-Endolymph Cochlea arises from sacculus. It is spirally coiled duct. It is also known as Lagena. It is connected with sacculus by duct of reuniens.

Correct Option: D

The diagramnatic cross section of a single loop of human cochlea represents the three different partsA- Perilymph B- Tertorial membrane C-Endolymph Cochlea arises from sacculus. It is spirally coiled duct. It is also known as Lagena. It is connected with sacculus by duct of reuniens.