Match the columns and choose the exact combination
(a) Ommatidia (i) Articulation with thorax (b) Trochanter (ii) For vision (c) Coxa (iii) Forming exoskeleton (d) Sclerites (iv) Fused with a large and stout femur
Match the columns and choose the exact combination
| (a) | Ommatidia | (i) | Articulation with thorax |
| (b) | Trochanter | (ii) | For vision |
| (c) | Coxa | (iii) | Forming exoskeleton |
| (d) | Sclerites | (iv) | Fused with a large and stout femur |
The correct option is C a-(ii) b-(iv) c-(i) d-(iii)
Ommatidia- The compound eyes of cockroach are composed of units called ommatidia (singular: ommatidium). It contains a cluster of photoreceptor cells surrounded by support cells and pigment cells. The outer part of the this is overlaid with a transparent cornea. The insect compound eye is an advanced structure because the number of ommatidia in insect eyes increases giving the eye sharpness of vision.
Tarsus and Coxa-Each leg of cockroach consists of five segments—coxa, trochanter, femur, tibia, Tarsus. A large basal coxa articulating with the thoracic segment between the pleuron and sternum, coxa is followed by a smaller trochanter which is freely movable on the coxa but is fixed to the next segment, the femur which is long and broad.
Sclerites- The entire body of cockroach is covered by a hard brown-coloured exoskeleton. The exoskeleton of each segment has four separate sclerites which are joined together by a delicate and elastic articular membrane.
So, the correct answer is “a-(ii), b-(iv), c-(i), d-(iii)”.
Ommatidia- The compound eyes of cockroach are composed of units called ommatidia (singular: ommatidium). It contains a cluster of photoreceptor cells surrounded by support cells and pigment cells. The outer part of the this is overlaid with a transparent cornea. The insect compound eye is an advanced structure because the number of ommatidia in insect eyes increases giving the eye sharpness of vision.
Tarsus and Coxa-Each leg of cockroach consists of five segments—coxa, trochanter, femur, tibia, Tarsus. A large basal coxa articulating with the thoracic segment between the pleuron and sternum, coxa is followed by a smaller trochanter which is freely movable on the coxa but is fixed to the next segment, the femur which is long and broad.
Sclerites- The entire body of cockroach is covered by a hard brown-coloured exoskeleton. The exoskeleton of each segment has four separate sclerites which are joined together by a delicate and elastic articular membrane.
So, the correct answer is “a-(ii), b-(iv), c-(i), d-(iii)”.
