SSC MTS EXAM

Detailed explanation-1: -(A) Aphids penetrate the plant with their stylet and move it through the apoplast toward the sieve tubes.

Detailed explanation-2: -Prior to feeding, the aphid stylet must penetrate the plant epidermis and move through the cortical layer. To facilitate this process, aphids secrete gel saliva which hardens to form a surface flange and a continuous tubular sheath encasing the full length of the stylet within the apoplast.

Detailed explanation-3: -Aphids feed from the phloem using needle-like mouthparts called “stylets”. They spit saliva into the sieve element to overcome plant defences.